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You searched for: Publication year rev 8025-1975 Remove constraint Publication year rev: 8025-1975 Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. 14C-Photosynthate Translocation in C3 and C4 Plants as Related to Leaf Anatomy

Author:
R. N. Gallaher; D. A. Ashley; R. H. Brown
Source:
Crop science 1975 v.15 no.1 pp. 55-59
ISSN:
0011-183X
Subject:
Amaranthus retroflexus; Glycine max; Megathyrsus maximus; Panicum milioides; leaf anatomy; phloem; photosynthesis
Abstract:
... This study was performed to investigate the relationship between ¹⁴C photosynthate translocation and phloem cross-sectional area in C₃ and C₄ plants. Spots 5 mm in diameter were labeled by ¹⁴CO₂ exposure on fully expanded leaves of two monocots (Panicum maximum Jacq., a C₄ species and Panicum milioides Nees ex. Trin., a C₃ species) and two dicots (Amaranthus retroflexus L., a C₄ species and Glycin ...
DOI:
10.2135/cropsci1975.0011183X001500010016x

2. 15N-Labelled Single-treatment Fertility Experiments

Author:
M. Fried; R. J. Soper; H. Broeshart
Source:
Agronomy journal 1975 v.67 no.3 pp. 393-396
ISSN:
0002-1962
Subject:
Oryza sativa; Triticum aestivum; Zea mays; ammonium; ammonium nitrogen; corn; developmental stages; fertilizer application; field experimentation; isotope labeling; nitrates; nitrogen fertilizers; nutrient uptake; quantitative analysis; rice; soil; stable isotopes; wheat
Abstract:
... There is only one way of measuring directly the uptake of nutrient from applied fertilizer as affected by timing, placement, fertilizer source, and environmental interactions. This is by isotope labelling of the fertilizer. The purpose of the present study is not only to demonstrate the effectiveness of this technique in field experiments, but to extend the technique to the direct measurement of t ...
DOI:
10.2134/agronj1975.00021962006700030028x

3. Absorption and Translocation of Sulfur Dioxide by Seedlings of Four Forest Tree Species

Author:
K. F. Jensen; T. T. Kozlowski
Source:
Journal of environmental quality 1975 v.4 no.3 pp. 379-382
ISSN:
0047-2425
Subject:
Acer saccharum subsp. saccharum; Betula alleghaniensis; Fraxinus americana; Populus grandidentata; absorption; forest trees; fumigation; leaves; roots; seedlings; sulfur; sulfur dioxide
Abstract:
... Rates of absorption of SO₂ and of translocation of absorbed sulfur were determined in sugar maple (Acer saccharum Marsh.), bigtooth aspen (Populus grandidentata Michx.), white ash (Fraxinus americana L.), and yellow birch seedlings [Betula alleghaniensis Britton (Betula lutea Michx. f.)]. Bigtooth aspen, a sensitive species, had the highest absorption rate with no prefumigation and sugar maple, a ...
DOI:
10.2134/jeq1975.00472425000400030021x

4. Absorption of foliar-applied 32P by successive leaves, and distribution patterns in relation to early fruiting and abscission in the cowpea (Vigna unguiculata L.)

Author:
Adedipe, N.O.; Ormrod, D.P.
Source:
Annals of botany 1975 v.39 no.162 pp. 639-646
ISSN:
0305-7364
Subject:
Vigna unguiculata; abscission; absorption; cowpeas; cultivars; flowering; fruits; leaves; phosphorus; plant tissues; racemes; radioactivity; radionuclides
Abstract:
... In controlled environment experiments, the uptake and distribution patterns of 32P were studied in relation to flowering and fruiting in the cowpea. Absorption by the plant, retention by the fed leaf, and translocation to various plant parts depended on the position and age of the fed leaf. At the 4-leaf stage, when the terminal leaflet of the first trifoliate (oldest) was fed 32P, the plant absor ...
DOI:
10.1093/oxfordjournals.aob.a084977

5. Acid-Catalyzed Borohydride Reduction of Vat Dyes

Author:
James T. Langland; Maurice M. Kreevoy; Robert C. Wade
Source:
Textile research journal 1975 v.45 no.7 pp. 532-534
ISSN:
0040-5175
Subject:
ambient temperature; borohydrides; dimethyl sulfoxide; dyes; fabrics; hydrides; moieties; pH; solvents; sulfuric acid; textile fibers
Abstract:
... Vat dyes can be quickly and efficiently reduced to their leuco forms by sodium borohydride (NaBH ₄) in acidic dimethyl sulfoxide (DMSO) at room temperature. Trifluoromethanesulfonic acid, methanesulfonic acid, or sulfuric acid were used to keep the pH ∼5 during the reaction. The acid is thought to catalyze the reaction by protonating the dye carbonyl groups, increasing their susceptibility to atta ...
DOI:
10.1177/004051757504500703

6. Acidification and Deacidification of Coastal Plain Soils as a Result of Periodic Flooding

Author:
N. van Breemen
Source:
Soil Science Society of America journal 1975 v.39 no.6 pp. 1153-1157
ISSN:
0361-5995
Subject:
acid soils; acid sulfate soils; acidification; alkalinity; bicarbonates; carbon dioxide; coastal plain soils; deacidification; dry season; ferric oxide; ferrous sulfate; hydrogen sulfide; hydrolysis; iron; oxidation; partial pressure; soil water; solubility; sulfuric acid; surface drainage; wet season
Abstract:
... Periodic flooding of recent coastal plain soils causes either acidification or deacidification of the surface horizons. Acidification of sulfate-bearing “nonacid” soils (pH > 5) involves formation of FeS and partial loss of alkalinity (HCO₃⁻) in the flood water during the wet season, followed by oxidation of FeS to ferric oxide and sulfuric acid in the dry season. Deacidification of acid soils (pH ...
DOI:
10.2136/sssaj1975.03615995003900060035x

7. Action of weak bases upon aflatoxin B1 in contact with macromolecular reactants

Author:
Beckwith, A.C.; Vesonder, R.F.; Ciegler, A.
Source:
Journal of agricultural and food chemistry 1975 v.23 no.3 pp. 582-587
ISSN:
0021-8561
Subject:
protein binding; chickens; ammonia; detoxification (processing); food contamination; aflatoxin B1; corn flour; embryo (animal); ammonium hydroxide; bioassays; toxicity testing; chemical degradation
DOI:
10.1021/jf60199a036
PubMed:
239046

8. Activite neoformatrice d'acides ribonucleiques extraits de tumeurs vegetales

Author:
Roussaux, J.
Source:
Physiologia plantarum 1975 v.35 no.4 pp. 269-272
ISSN:
0031-9317
Subject:
carrots; Agrobacterium radiobacter; Alcaligenes faecalis; Escherichia coli
DOI:
10.1111/j.1399-3054.1975.tb03905.x

9. The Activity Concept of Phosphate-Rock Solubility

Author:
S. H. Chien; C. A. Black
Source:
Soil Science Society of America journal 1975 v.39 no.5 pp. 856-858
ISSN:
0361-5995
Subject:
carbonates; hydrochloric acid; hydroxyapatite; pH; rock phosphate; solubility; Florida
Abstract:
... Variously treated samples of a finely ground Florida phosphate rock were equilibrated with dilute HCl solutions, and the ion-activity product of the carbonate apatite mineral in the phosphate rock was then determined from analyses made on the solutions. Constant ion-activity products or solubility-product constants were found within a certain pH range in each instance. The solubility, as reflected ...
DOI:
10.2136/sssaj1975.03615995003900050021x

10. Activity changes in selected enzymes from soybean leaves following ozone exposure

Author:
Tingey, D.T.; Fites, R.C.; Wickliff, C.
Source:
Physiologia plantarum 1975 v.33 no.4 pp. 316-320
ISSN:
0031-9317
Subject:
plant damage
DOI:
10.1111/j.1399-3054.1975.tb03175.x

11. The Adaptive Significance of Variations in Life History among Local Populations of Atlantic Salmon in North America

Author:
William M. Schaffer; Paul F. Elson
Source:
Ecology 1975 v.56 no.3 pp. 577-590
ISSN:
0012-9658
Subject:
Salmo salar; breeding; correlation; environmental factors; fisheries; freshwater; genes; life history; prediction; rivers; salmon; spawning; Maine
Abstract:
... In this paper variations in life history data among local populations of Atlantic salmon have been examined. The following patterns emerge: (1) The mean age of first spawning increases with the difficulty of upstream migration as estimated by the distance the fish ascend into freshwater. Other indices of river harshness yield similar results. (2) The effect of commercial fishing has been to elimin ...
DOI:
10.2307/1935492

12. The Adsorption of Water by Fibers Immersed in Organic Solvents

Author:
Chiro Kido; Isao Ikeda; Hiromi Sakaguchi; Tatsuhiko Onoe
Source:
Textile research journal 1975 v.45 no.6 pp. 437-441
ISSN:
0040-5175
Subject:
adsorption; equations; ethyl acetate; fabrics; rayon; solvents; sorption isotherms; temperature; textile fibers
Abstract:
... Equilibrium water adsorption data, obtained by immersing dry rayon or other dry fibers in an organic solvent containing water at 30°C, were determined at different concentrations of water in the solvent by the Karl Fischer method and were plotted against the concentrations of water to obtain the adsorption isotherm. For ethyl acetate and other solvents, sigmoidal curves of the adsorption isotherms ...
DOI:
10.1177/004051757504500601

13. Advection Modification of the Priestley and Taylor Evapotranspiration Formula

Author:
W. A. Jury; C. B. Tanner
Source:
Agronomy journal 1975 v.67 no.6 pp. 840-842
ISSN:
0002-1962
Subject:
Medicago sativa; advection; air temperature; alfalfa; evapotranspiration; irrigation; models; net radiation; potatoes
Abstract:
... The empirical formula of Priestly and Taylor (1972) relating the evapotranspiration from a well-watered surface to the net radiation and a function of the air temperature is modified to include a saturation deficit term to account for high local advection. The model is tested on two seasons of daily evapotranspiration measurements over irrigated potatoes (Solarium tuberosum L.), resulting in good ...
DOI:
10.2134/agronj1975.00021962006700060031x

14. Aflatoxin problem in corn and possible solutions

Author:
Lillehoj, E.B.; Zuber, M.S.
Source:
Proceedings of the annual Corn and Sorghum Research Conference 1975 v.30th pp. 230-250
Subject:
food contamination; corn; aflatoxins; carcinogenicity; feed contamination; chemical structure; Aspergillus flavus
Handle:
10113/29471

15. Aflatoxin production and Lepidopteran insect injury on corn in Georgia

Author:
Widstrom, N.W.; Sparks, A.N.; Lillehoj, E.B.; Kwolek, W.F.
Source:
Journal of economic entomology 1975 v.68 no.6 pp. 855-856
ISSN:
0022-0493
Subject:
Helicoverpa zea; dent corn; chemical concentration; Zea mays; bags; corn ears; physical control; microbial contamination; aflatoxin B1; crop damage; Spodoptera frugiperda; insect control; Aspergillus flavus; Ostrinia nubilalis; Georgia
DOI:
10.1093/jee/68.6.855

16. Aflatoxins in Cottonseed as Affected by the Pink Bollworm

Author:
J. L. McMeans; C. M. Brown
Source:
Crop science 1975 v.15 no.6 pp. 865-866
ISSN:
0011-183X
Subject:
Aspergillus flavus; Gossypium hirsutum; Pectinophora gossypiella; aflatoxins; cotton; cottonseed; harvesting; insects; larvae
Abstract:
... Pink bollworm [Pectinophora gossypiella (Saunders)] larval exit holes increased infection by Aspergillus flavus Link and aflatoxin accumulation in seed from all zones of the cotton plant (Gossypium hirsutum L.). The average aflatoxin level in seed from the bottom, middle, and top zones of the plant was at least 1,000 times greater in 1970, when the pink bollworm was common, than in 1965 when the i ...
DOI:
10.2135/cropsci1975.0011183X001500060035x

17. Age Distribution in Virgin Red Spruce and Northern Hardwoods

Author:
W. B. Leak
Source:
Ecology 1975 v.56 no.6 pp. 1451-1454
ISSN:
0012-9658
Subject:
Abies balsamea; Acer saccharum; Betula alleghaniensis; Betula papyrifera; Fagus grandifolia; Picea rubens; Sorbus americana; hardwood; population growth; stems; survival rate; New Hampshire
Abstract:
... Age distributions are given for four species in a virgin spruce—fir stand in New Hampshire together with comparative data from virgin northern hardwoods. Three distinct forms of age distribution were found: (1) essentially linear relationships of numbers of stems (log) vs. age (log) denoting stationary populations with a power function form of survivorship; (2) concave age distributions indicative ...
DOI:
10.2307/1934714

18. Age-Dependent Resistance to Transmissible Gastroenteritis of Swine: III. Effects of Epithelial Cell Kinetics on Coronavirus Production and on Atrophy of Intestinal Villi

Author:
H. W. Moon; L. J. Kemeny; G. Lambert; S. L. Stark; G. D. Booth
Source:
Veterinary pathology v.12 no.5-6 pp. 434-445
ISSN:
1544-2217
Subject:
Transmissible gastroenteritis virus; adults; animal pathology; atrophy; epithelial cells; neonates; small intestine; swine; transmissible gastroenteritis; villi; viral load; viruses
Abstract:
... Coronavirus titers in small intestine, degree of villous atrophy and apparent rates of regeneration of intestinal villi were compared in newborn, 3-week-old and adult pigs for 1 week after they were exposed to the transmissible gastroenteritis virus of swine. The response within the newborn group was homogeneous, resulting in high virus titers, maximal villous atrophy and comparatively slow regene ...
DOI:
10.1177/0300985875012005-00610

19. An Age-Stable Feed Yarn for Draw Texturing by the False-Twisting Process 1

Author:
O.L. Shealy; R.E. Kitson
Source:
Textile research journal 1975 v.45 no.2 pp. 112-117
ISSN:
0040-5175
Subject:
dyes; fabrics; polyesters; textile fibers; texturization; yams; yarns
Abstract:
... Coupled drawing and false-twist texturing of undrawn polyester yarns offers potential for better dye and bulk uni formi'ty, higher fabric stretch and bulk, and reduced texturing costs. However, the well known age instability of un drawn polyester yarn makes difficult the use of draw texturing by throwsters. The research on which this paper is based defined a feed yam for draw texturing with the ag ...
DOI:
10.1177/004051757504500205

20. Age‐Specific Energetics of the Pea Aphid, Acrythosiphon pisum

Author:
Polley Ann Randolph; J. C. Randolph; C. A. Barlow
Source:
Ecology 1975 v.56 no.2 pp. 359-369
ISSN:
0012-9658
Subject:
Acyrthosiphon pisum; adults; amino acid composition; amino acids; balance sheet; energy flow; exoskeleton; exudation; honeydew; insects; oxygen consumption; peas; phloem; primary productivity; reproduction; sap; seedlings; stylets; sugars
Abstract:
... A laboratory study of energy flow in different—aged pea aphids was accomplished by the balance sheet method. Growth, reproduction, molted exoskeletons, oxygen consumption, and honeydew production were monitored daily. Absolute amounts of energy expended on reproduction, growth, maintenance, and rejecta all varied with age of the aphid. Efficiencies of production and respiration also varied with th ...
DOI:
10.2307/1934966

21. Agricultural fibers in the paper industry

Author:
Miller, D.L.; Wolff, I.A.
Source:
Solid wastes : origin, collection, processing and disposal / edited by C.L. Mantell 1975 pp. 525-544
Subject:
plant fibers; paper pulp; pulpwood; herbaceous plants; grain crops; straw
Handle:
10113/29493

22. Agricultural policy advice and the public inquiry process

Author:
R.G. Mauldon
Source:
Australian journal of agricultural and resource economics 1975 v.19 no.2 pp. 69-80
ISSN:
1364-985X
Subject:
agricultural policy; industry; rural programs; Australia
Abstract:
... The Industries Assistance Commission came into existence in 1974. It extends to all industries, including the rural industries, the system of public scrutiny of advice regarding assistance. This paper considers the ethos of the IAC's establishment. It discusses some criteria which are features of the IAC's operation, and which are considered to be necessary for an effective public inquiry process. ...
DOI:
10.1111/j.1467-8489.1975.tb00147.x

23. Agricultural residues, including feedlot wastes

Author:
Sloneker, J.H.
Source:
Enzymatic conversion of cellulosic materials : technology and applications : symposium proceedings 1975 pp. 235-250
ISSN:
0572-6565
Subject:
chemical composition; feedlots; crop residues; soil productivity; nutritive value; agricultural industry; soil fertility; agricultural wastes; digestibility; land use; United States
Handle:
10113/29559

24. Agriculture source of raw materials for plastics: economic considerations

Author:
Moore, C.A.
Source:
Renewable resources for plastics : Growth and change in adhesives ; chemical requirements of the tobacco industry : symposia 1975 pp. 73-86
Subject:
agricultural products; agricultural industry; petroleum; raw materials; plastics; economic analysis; food production
Handle:
10113/29580

25. Agrobacterium tumefaciens, a promoter of wound healing in Betula allehganiensis

Author:
Blanchette, R.A.; Sharon, E.M.
Source:
Canadian journal of forest research 1975 v.5 no.4 pp. 722-730
ISSN:
0045-5067
Subject:
plant damage
DOI:
10.1139/x75-098

26. Agronomic and Genetic Analysis of Tarnished Plant Bug Tolerance in Cotton

Author:
William R. Meredith; M. L. Laster
Source:
Crop science 1975 v.15 no.4 pp. 535-538
ISSN:
0011-183X
Subject:
Brassica juncea; Gossypium hirsutum; Lygus lineolaris; additive gene effects; backcrossing; cultivars; epistasis; genetic analysis; insecticides; lint cotton; lint yield
Abstract:
... We investigated at Stoneville, Miss., in 1973, the effects of heavy and light infestations of tarnished plant bugs, Lygus lineolaris (Palisot de Beauvois), on six genetic populations of cotton, Gossypium hirsutum L. Mustard Brassica juncea (L.) Czern, planted in rows adjacent to cotton, was used to attract and accumulate large numbers of plant bugs. The light infestations of plant bugs were mainta ...
DOI:
10.2135/cropsci1975.0011183X001500040025x

27. Alfalfa Flower Color Associated with Differential Seed Set by Leaf-cutter Bees

Author:
B. P. Goplen; S. A. Brandt
Source:
Agronomy journal 1975 v.67 no.6 pp. 804-806
ISSN:
0002-1962
Subject:
Medicago sativa; Megachile rotundata; alfalfa; bees; florets; flower color; flowering; pods; pollination; racemes; seed set; seed weight; seed yield; seeds
Abstract:
... Many studies have been carried out to demonstrate that alfalfa (Medicago sativa L.) plants vary in their attractiveness to bees. Flower color has often been implicated as one of the factors in attractiveness, but the reports are conflicting and inconclusive. Field observations by the authors indicated that yellow flowered alfalfa plants were tripped less frequently and set less seed than the commo ...
DOI:
10.2134/agronj1975.00021962006700060019x

28. Algal Ecology of Southern Icelandic Hot Springs in Winter

Author:
Jon A. Sperling
Source:
Ecology 1975 v.56 no.1 pp. 183-190
ISSN:
0012-9658
Subject:
Lyngbya; Mastigocladus laminosus; Phormidium; algae; effluents; energy; hot springs; lighting; niches; overwintering; primary productivity; solar radiation; sowing; spring; summer; surveys
Abstract:
... A Survey of algal habitats of southern Icelandic hot springs (Hengill—Olfus district) was made between December 15, 1968, and January 20, 1969. Carbon—14 primary productivity was measured in experiments designed to compare the role of direct solar radiation on algal habitats of different aspect and inclination. Incident light (0.4—0.7) @mm) energy on December 20, was 23.1, 3.3, and 5.1 g—cal/cm².d ...
DOI:
10.2307/1935310

29. Alkaloid Concentration in Plant Parts of Reed Canarygrass of Varying Maturity

Author:
J. L. Hagman; G. C. Marten; A. W. Hovin
Source:
Crop science 1975 v.15 no.1 pp. 41-43
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... These experiments were conducted to assist plant breeders and forage management researchers who need to know the primary site of alkaloids within reed canarygrass (Phalaris arundinacea L.) forage at specific stages of plant maturity. Alkaloids appear to be responsible for the relatively poor palatability and potential toxicity of this grass to ruminants. We determined alkaloid distribution in leav ...
DOI:
10.2135/cropsci1975.0011183X001500010012x

30. Die Alkaloide von Gabunia eglandulosa Stapf. 155. Mitteilung uber Alkaloide

Author:
Agwada, V.C.; Morita, Y.; Renner, U.; Hesse, M.; Schmid, H.
Source:
Helvetica chimica acta 1975 v.58 no.4 pp. 1001-1016
ISSN:
0018-019X
Subject:
Apocynaceae
DOI:
10.1002/hlca.19750580405

31. Allelochemic Effects of Petalostemon Gattingeri on the Distribution of Arenaria Patula in Cedar Glades

Author:
Barbara Homan Turner; Elsie Quarterman
Source:
Ecology 1975 v.56 no.4 pp. 924-932
ISSN:
0012-9658
Subject:
Caryophyllaceae; Dalea; aerobes; bacteria; clay fraction; growth retardation; seed germination; seedling growth; seedlings; silt; Tennessee
Abstract:
... Petalosdtemon gattingeri (Heller) Heller (Leguminosae) influences the distribution pattern of Arenaria patula Michx. (Caryophyllaceae) in cedar glades of middle Tennessee by means of inhibitors present at all seasons of the year in some or all parts of the Petalostemon plant. The inhibitors are leached from living plants and from litter shed in September and October and are retained by the soil. I ...
DOI:
10.2307/1936302

32. The Allelopathic Influences of Sassafras albidum in Old‐field Succession in Tennessee

Author:
Robert E. Gant; Edward E. C. Clebsch
Source:
Ecology 1975 v.56 no.3 pp. 604-615
ISSN:
0012-9658
Subject:
Acer negundo; Sassafras albidum; Ulmus americana; allelopathy; alpha-phellandrene; buried seeds; canopy; citral; eugenol; field experimentation; flora; germination; herbs; leachates; leaves; phytotoxins; pure stands; roots; safrole; soil; surveys; understory; Tennessee
Abstract:
... Allelopathy seems to be the mechanism that allows Sassafras albidum to maintain itself in relatively pure stands through many stages of old—field succession. Field studies revealed that 10 species consistently occurred exclusively outside of clump canopies and 7 other species predominated beneath the sassafras canopy. We suggest that annual herbs are being effectively excluded from the understory ...
DOI:
10.2307/1935494

33. Altitudinal Variation of Chlorophyll Concentration and Reflectance of the Bark of Populus tremuloides

Author:
W. Wallace Covington
Source:
Ecology 1975 v.56 no.3 pp. 715-720
ISSN:
0012-9658
Subject:
Populus tremuloides; absorption; air temperature; altitude; bark; chlorophyll; mountains; periderm; photosynthesis; reflectance; scald diseases; trees; New Mexico
Abstract:
... Although quaking aspen (Populus tremuloides Michx.) bark appears greener at higher elevations in the Sangre de Cristo mountain range of New Mexico, chlorophyll concentrations are inversely correlated (p = .001) with altitude. The higher concentration of chlorophyll at lower elevations is effectively masked by a white bloom of dead periderm cells which is also characteristic of exposed site trees. ...
DOI:
10.2307/1935507

34. An Aluminum Block Digester for Plant and Soil Analysis

Author:
R. N. Gallaher; C. O. Weldon; J. G. Futral
Source:
Soil Science Society of America journal 1975 v.39 no.4 pp. 803-806
ISSN:
0361-5995
Subject:
aluminum; ambient temperature; equipment; government agencies; research support; soil; soil sampling
Abstract:
... Almost every institution, whether it be a university, a government agency, or a medical or industrial facility, that conducts research on and is concerned with the elemental analysis of biological material has a need for equipment to ash or acid-digest samples. Often funds are not available with which to purchase commercial equipment and the researcher is required to be innovative and to design an ...
DOI:
10.2136/sssaj1975.03615995003900040052x

35. Amblyseius bibens (acarina: phytoseiidae), a predator of spider mites (tetranychidae) in madagascar

Author:
BLOMMERS, LEO; ETTEN, JAAP
Source:
Entomologia experimentalis et applicata 1975 v. no. pp. 329-336
ISSN:
0013-8703
Subject:
Amblyseius; Tetranychidae; adults; beans; biotopes; eggs; feeding preferences; females; irrigated farming; oviposition; predation; predator-prey relationships; Madagascar
Abstract:
... Field observation indicated that A. bibens is an important predator of several Tetranychus-species in parts of Madagascar. Its dependence on water for drinking was demonstrated; this feature limits its presence to more humid biotopes. Its importance in the irrigated areas of the dry southwest is stressed. A. bibens proved capable of eradicating T. urticae on potted bean plants. Predation and ovipo ...
DOI:
10.1111/j.1570-7458.1975.tb00405.x

36. Amino Acid and Elemental Composition of Sunflower and Pumpkin Seeds

Author:
R. G. Robinson
Source:
Agronomy journal 1975 v.67 no.4 pp. 541-544
ISSN:
0002-1962
Subject:
Calciaquolls; Cucurbita pepo; Hapludolls; Helianthus annuus; Kjeldahl method; amino acids; calcium; crops; cultivars; elemental composition; nitrogen; nutritive value; oils; pericarp; protein content; proteins; pumpkins; seeds; snacks; sodium; sunflower seed; Minnesota
Abstract:
... The research was undertaken because knowledge of the amino acid and elemental composition of sunflower (Helianthus annnus L.) and pumpkin (Cucurbita pepo L) seeds is meager and incomplete. Yet, in contrast to their present use as snacks, both species are widely-adapted crops of potential use for staple human food. Seeds of the two species were evaluated as foods, to meet major protein and mineral ...
DOI:
10.2134/agronj1975.00021962006700040022x

37. Ammonia Retention in Tropical Soils as Influenced by Moisture Content and Continuous Submergence

Author:
S. S. Shimpi; N. K. Savant
Source:
Soil Science Society of America journal 1975 v.39 no.1 pp. 153-154
ISSN:
0361-5995
Subject:
ammonia; laboratory experimentation; laterites; submergence; tropical soils; water content
Abstract:
... Under laboratory conditions, when moisture contents increased from 0 (oven-dry) to 30%, amount of NH₃ retained in noncalcareous medium black soil and lateritic soil decreased. However, subsequent increase in moisture content from 30 to 100% resulted in increased NH₃-retention in the soils. Continuous submergence favored NH₃-retention in the soils. ...
DOI:
10.2136/sssaj1975.03615995003900010040x

38. Ammonia Volatilization from Surface Applications of Ammonium Compounds on Calcareous Soils: III. Effects of Mixing Low and High Loss Ammonium Compounds

Author:
L. B. Fenn
Source:
Soil Science Society of America journal 1975 v.39 no.2 pp. 366-368
ISSN:
0361-5995
Subject:
ammonia; ammonium; ammonium carbonate; ammonium nitrate; ammonium nitrogen; ammonium sulfate; calcareous soils; mixing; volatilization
Abstract:
... Losses of NH₃-N from surface applications of NH₄F and (NH₄)₂SO₄ to a calcareous soil were reduced by mixing either NH₄H₂PO₄ or NH₄NO₃ with these two compounds. Inclusion of 30% NH₄H₂PO₄ on an NH₄⁺ equivalent basis, in the (NH₄)₂SO₄ or NH₄F mixtures was sufficient to lower NH₃ losses to levels similar to those for NH₄H₂PO₄. Additions of NH₄H₂PO₄ to (NH₄)₂CO₃ had less effect on NH₃ loss and even wit ...
DOI:
10.2136/sssaj1975.03615995003900020035x

39. Ammonia Volatilization from Surface Applications of Ammonium Compounds on Calcareous Soils: IV. Effect of Calcium Carbonate Content

Author:
L. B. Fenn; D. E. Kissel
Source:
Soil Science Society of America journal 1975 v.39 no.4 pp. 631-633
ISSN:
0361-5995
Subject:
acidity; ammonia; ammonium nitrate; ammonium nitrogen; ammonium sulfate; application rate; calcareous soils; calcium carbonate; equations; regression analysis; soil pH; temperature; volatilization
Abstract:
... The purpose of this study was to determine the effect of soil CaCO₃ content on ammonia volatilization from surface applied ammonium compounds. Ammonia-nitrogen losses from surface-applied (NH₄)₂SO₄ increased rapidly to 6.1% soil CaCO₃, with slight NH₃ loss increases from 6.1 to 9.7% soil CaCO₃, and no NH₃ loss increase beyond 9.7% soil CaCO₃. Ammonium nitrate reached maximum NH₃-N loss at 1.3% soi ...
DOI:
10.2136/sssaj1975.03615995003900040019x

40. Ammonium hydroxide treatment of aflatoxin B1. Some chemical characteristics and biological effects

Author:
Vesonder, R.F.; Beckwith, A.C.; Ciegler, A.; Dimler, R.J.
Source:
Journal of agricultural and food chemistry 1975 v.23 no.2 pp. 242-243
ISSN:
0021-8561
Subject:
aflatoxin B1; chemical degradation; ammonium hydroxide; detoxification (processing); toxicity testing; bioassays; embryo (animal); chickens
DOI:
10.1021/jf60198a044
PubMed:
1133297

41. Amount of Clay Needed for Optimum X-Ray Diffraction Analysis

Author:
C. I. Rich
Source:
Soil Science Society of America journal 1975 v.39 no.1 pp. 161-162
ISSN:
0361-5995
Subject:
X-ray diffraction; absorbance; clay
Abstract:
... The amount of clay necessary for optimum X-ray diffraction patterns is reported. The calculations are based on the mass absorption coefficient, the angle of diffraction, and the use of the slide. ...
DOI:
10.2136/sssaj1975.03615995003900010045x

42. Amylase activity in the midgut of sarcophaga ruficornis and musca domestica

Author:
SINHA, MINAKSHI
Source:
Entomologia experimentalis et applicata 1975 v. no. pp. 290-296
ISSN:
0013-8703
Subject:
Musca domestica; Sarcophaga ruficornis; amylases; enzyme activity; imagos; larvae; midgut; pH
Abstract:
... The pH for the optimum activity of amylase from the midgut of the third-instar larvae and adults of Sarcophaga ruficornis and Musca domestica ranged from pH 6.5 to 7.0 and 7.0 to 7.5, respectively. Maximum activity of the enzyme was observed at 50°C and the activity increased with increasing time period and enzyme concentration. Amylase from the midgut of the adult flies was more active than that ...
DOI:
10.1111/j.1570-7458.1975.tb00400.x

43. Analyse factorielle des relations entre le milieu et la production: etude des tremblaies de la section laurentienne

Author:
Waksman, G.; Menard, M.; Belanger, J.
Source:
Canadian journal of forest research = 1975 v.5 no.4 pp. 662-680
ISSN:
0045-5067
Subject:
Populus tremuloides
DOI:
10.1139/x75-093

44. Analysis of Aggregation Errors in Linear Programming Planning Models

Author:
Alvin C. Egbert; Hyung M. Kim
Source:
American journal of agricultural economics 1975 v.57 no.2 pp. 292-301
ISSN:
0002-9092
Subject:
agricultural economics; agricultural industry; linear programming; models; planning; Portugal
Abstract:
... An analysis was made of errors which can result from regional aggregation in spatial linear programming models. The agricultural sector of Portugal provided the empirical base for the analysis. Programming solutions were obtained first for eleven regions and then for three regions which were aggregates of the eleven regions. It is concluded that significant errors which resulted from this form of ...
DOI:
10.2307/1238504

45. An Analysis of Alternative Grain Distribution Systems

Author:
George W. Ladd; Dennis R. Lifferth
Source:
American journal of agricultural economics 1975 v.57 no.3 pp. 420-430
ISSN:
0002-9092
Subject:
agricultural economics; elevators; income; markets; models; rail transportation
Abstract:
... A transshipment plant location model is used to determine the number, size, and location of new subterminals, expansions in storage capacity of existing country elevators, the rail network, and the monthly flows of grain from origins to elevators to destinations to maximize joint net revenue of grain producers within a 6 1/2‐county region. A grain transportation system having fewer rail lines woul ...
DOI:
10.2307/1238404

46. Analysis of field experiment of Bacillus thuringiensis products on the common cabbage worm (Lepidoptera: Pieridae)

Author:
Nagasawa, S.; Asano, S.; Seki, S.
Source:
Nihon ouyou doubutsu konchuu gakkaishi 1975 v.19 no.2 pp. 112-114
ISSN:
0021-4914
Subject:
Pieridae; biological control
DOI:
10.1303/jjaez.19.112

47. Analytical Characteristics of Humic and Fulvic Acids Extracted from Tropical Volcanic Soils

Author:
S. M. Griffith; M. Schnitzer
Source:
Soil Science Society of America journal 1975 v.39 no.5 pp. 861-867
ISSN:
0361-5995
Subject:
climatic zones; fertilizers; fulvic acids; islands; moieties; silica; spectroscopy; tropical soils; volcanic soils; water solubility; Caribbean; Dominica
Abstract:
... Certain tropical soils formed on materials of volcanic origin on islands in the West Indies, tend to accumulate substantial amounts of organic matter but are so infertile that the addition of lime and fertilizers does not increase crop response. To obtain a better understanding of this unusual behavior, humic and fulvic acids were extracted from problem soils on the island of Dominica, and charact ...
DOI:
10.2136/sssaj1975.03615995003900050023x

48. Anatomical Responses of ‘Merion’ Kentucky Bluegrass and ‘Pennlawn’ Red Fescue at Reduced Light Intensities

Author:
J. F. Wilkinson; J. B. Beard
Source:
Crop science 1975 v.15 no.2 pp. 189-194
ISSN:
0011-183X
Subject:
Festuca rubra subsp. rubra; Poa pratensis; grana; lawns and turf; leaf blade; light intensity; light quality; soil temperature; soil water; thylakoids; ultrastructure
Abstract:
... The objectives were to characterize the anatomical responses of Kentucky bluegrass and red fescue to reduced light intensities. Kentucky bluegrass (Poa pratensis L. ‘Merion’) and red fescue (Festuca rubra L. ‘Pennlawn’) were grown in separate growth chambers at light intensities of 2.7, 10.8. and 43 klux. Light quality, soil moisture, and soil temperature were standardized among chambers. Anatomic ...
DOI:
10.2135/cropsci1975.0011183X001500020014x

49. Annual Production and Disappearance of Detritus on Three South Carolina Old Fields

Author:
Richard G. Wiegert; John T. McGinnis
Source:
Ecology 1975 v.56 no.1 pp. 129-140
ISSN:
0012-9658
Subject:
Andropogon; Lespedeza; crops; forbs; mortality; primary productivity; vegetation; Michigan; South Carolina
Abstract:
... Aboveground vegetative production was measured for two consecutive years in three South Carolina old fields beginning with a 1—yr mixed forb field, a 12—yr broomsedge (Andropogon) field, and a 12—yr Lespedeza field. Vegetative production was periodically harvested and corrected for mortality between sampling periods. Total aboveground production by the vegetation was mixed forb, 1,321 and 1,447 kc ...
DOI:
10.2307/1935305

50. Annual crops: a renewable source for cellulose

Author:
Miller, D.L.
Source:
Applied polymer symposia 1975 v.28 pp. 21-28
ISSN:
0570-4898
Subject:
fiber crops; annuals; cellulose; crop production; crop residues; plant byproducts; papermaking; pulping; renewable resources; United States
Handle:
10113/29542

51. Anolis Cupreus: The Response of a Lizard to Tropical Seasonality

Author:
Theodore H. Fleming; Roderick S. Hooker
Source:
Ecology 1975 v.56 no.6 pp. 1243-1261
ISSN:
0012-9658
Subject:
Anolis carolinensis; air temperature; climatic factors; dry season; fat body; forest ecosystems; habitats; lizards; males; population density; riparian forests; seasonal variation; sexual dimorphism; sexual maturity; solar radiation; temperate zones; territoriality; wet season; wind speed; Costa Rica
Abstract:
... Seasonal changes in the population ecology of Anolis cupreus, a sexually dimorphic lizard, were studied over a 2—yr period in a deciduous and riparian forest ecosystem in western Costa Rica. This tropical environment undergoes strong seasonal changes, including a 6—mo yr dry season during which maximum air temperatures, hours of daily sunshine, and heavy winds occur. Many aspects of the ecology of ...
DOI:
10.2307/1934695

52. Anomalous Diurnal Patterns of Stem Xylem Water Potentials in Larrea tridentata

Author:
James P. Syvertsen; G. L. Cunningham; T. V. Feather
Source:
Ecology 1975 v.56 no.6 pp. 1423-1428
ISSN:
0012-9658
Subject:
Larrea tridentata; diurnal variation; photosynthesis; rooting; shrubs; soil profiles; summer; temperature profiles; water vapor; xylem
Abstract:
... Diurnal stem xylem H₂O potentials of Larrea tridentata (DC.) Cov. were measured with a pressure chamber during the summers of 1973, 1974. Plants growing in dry soils had minimum stem xylem H₂O potentials at night and maximum values during the daylight hours. Vertical H₂O vapor movements in the soil profile in response to temperature gradients may be implicated although further data are needed to e ...
DOI:
10.2307/1934709

53. Anthraquinones and Phenols as Intermediates in the Formation of Dark-Colored, Humic Acid-Like Pigments by Eurotium echinulatum

Author:
C. Saiz-Jimenez; K. Haider; J. P. Martin
Source:
Soil Science Society of America journal 1975 v.39 no.4 pp. 649-653
ISSN:
0361-5995
Subject:
Eurotium; Vertisols; acid hydrolysis; acidification; anthracenes; asparagine; benzoic acids; color; culture media; dithionite; emodin; fungi; hydrochloric acid; hydrolysates; mycelium; phenols; pigments; polymers; sodium; sodium nitrate; Spain
Abstract:
... Eurotium echinulatum, a fungus isolated from a vertisol in southern Spain, formed humic acid-like pigments during growth in glucose-asparagine or glucose-NaNO₃ media. After 6 to 7 days the phenols, orsellinic, p-hydroxycinnamic, and p-hydroxybenzoic acids, and the anthraquinones, endocrocin, emodin, and physicion were detected in the culture media. Upon further development of the mycelial mats add ...
DOI:
10.2136/sssaj1975.03615995003900040023x

54. Application of Density Slicing Techniques to Soil Survey

Author:
Victor A. Odenyo; Richard H. Rust
Source:
Soil Science Society of America journal 1975 v.39 no.2 pp. 311-315
ISSN:
0361-5995
Subject:
color; cropping systems; landscapes; models; photography; soil; soil map; soil surveys; Minnesota
Abstract:
... A density slicing instrument (ISI Model VP 8 Image Analyser) was used to analyze NASA's RB-57 F 1:60,000 false color film (Kodak 2443) photography of a section of Norman County, northwestern Minnesota. Prints of the density-level slice color-coded display screen were made. Ground truth checking demonstrated that the soil boundaries were more accurately located on the color-coded density maps than ...
DOI:
10.2136/sssaj1975.03615995003900020024x

55. Application of Restricted Selection Indices for Grain Yield Improvement in Oats

Author:
A. A. Rosielle; K. J. Frey
Source:
Crop science 1975 v.15 no.4 pp. 544-547
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Genotypic correlations among grain yield, heading date, and height, calculated from a population of 1,200 F₉- derived oat (Avena satlva L.) lines tested in six environments, showed that unrestricted selection for high grain yield would save undesirable lines with late heading dates and tall plant heights. We used restricted selection indices to examine the effect of restricting heading date and he ...
DOI:
10.2135/cropsci1975.0011183X001500040028x

56. Application of Soil Taxonomy in Tidal Areas of the Southeastern United States1,2

Author:
J. R. Coover; Lindo J. Bartelli; Warren C. Lynn
Source:
Soil Science Society of America journal 1975 v.39 no.4 pp. 703-706
ISSN:
0361-5995
Subject:
Alfisols; Histosols; Hydraquents; Sulfaquents; coasts; freshwater marshes; magnesium; sea level; seawater; sediment deposition; sodium; soil surveys; soil taxonomy; spodic horizons; submergence; subsidence; sulfides; upland soils; Southeastern United States
Abstract:
... Several million hectares of soils of the southeastern United States are subject to inundation by tidal action. The influence of seawater is reflected in the higher proportions of Na and Mg in these soils than in surrounding upland soils or soils in fresh water marshes. Rise in sea level and subsidence of some coastal areas have combined to submerge soils. Diagnostic features such as argillic and s ...
DOI:
10.2136/sssaj1975.03615995003900040034x

57. Assimilate distribution in Poa annua L

Author:
Ong, C.K.; Marshall, C.
Source:
Annals of botany 1975 v.39 no.3 pp. 413-421
ISSN:
0305-7364
Subject:
Poa annua; carbon; filling period; flowering; grains; grasses; leaves; perennials; ripening; roots; tillers
Abstract:
... The carbon economy of a flowering tiller of Poa annua L. has been examined over the period from inflorescence emergence to grain shedding. The total import of 14C by the inflorescence reached a maximum at late grain filling but the relative import of assimilate was greatest 14 days after its appearance and represented 20–25 per cent of that assimilated by the inflorescence itself. The inflorescenc ...
DOI:
10.1093/oxfordjournals.aob.a084955

58. Associations Among Traits in Progenies from Avena sativa L. ✕ A. sterilis L. Crosses

Author:
P. M. Lyrene; H. L. Shands
Source:
Crop science 1975 v.15 no.3 pp. 361-363
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... The relationships between groat protein percentage and several other agronomic traits were studied in F₂ and F₃ progenies of six Arena sativa ✕ A. sterilis crosses. Groat protein percentage was negatively correlated with groat plumpness, groat percentage, and grain yield. High groat protein was associated with several undesirable spikelet characteristics inherited from A. sterilis, including spike ...
DOI:
10.2135/cropsci1975.0011183X001500030024x

59. Attraction of wild and laboratory-cultured dacus oleae flies to small rectangles of different hues, shades, and tints

Author:
PROKOPY, RONALD J.; ECONOMOPOULOS, A.P.; McFADDEN, M.W.
Source:
Entomologia experimentalis et applicata 1975 v. no. pp. 141-152
ISSN:
0013-8703
Subject:
Bactrocera oleae; aluminum foil; apricots; color; diet; energy; eyes; green leafy vegetables; insects; larvae; leaves; nutrients; olives; oranges; polymethylmethacrylate; reflectance; trees
Abstract:
... Responses of laboratory-cultured and wild Dacus oleae flies to small sticky-coated rectangles hung in olive or apricot trees showed that yellow rectangles captured slightly to many more flies than any others tested, including: light, medium, and dark oranges, greens and grays; red; blue; black; white; aluminum foil; slight, medium, or strong tints of yellow; clear Plexiglas; and the top or bottom ...
DOI:
10.1111/j.1570-7458.1975.tb02364.x

60. Das Auftreten von Pathotypen von Phytophthora infestans (Mont.) de Bary in er Bundesrepublik Deutschland

Author:
Schrober, B.
Source:
Potato research 1975 v.18 no.1 pp. 130-132
ISSN:
0014-3065
Subject:
potatoes; German Federal Republic
DOI:
10.1007/BF02361786

61. The Autecology of Sawgrass in the Florida Everglades

Author:
Kerry K. Steward; W. Harold Ornes
Source:
Ecology 1975 v.56 no.1 pp. 162-171
ISSN:
0012-9658
Subject:
Cladium mariscus subsp. jamaicense; calcium; copper; culms; developmental stages; iron; leaves; macrophytes; marshes; nitrogen; nutrient availability; nutrient requirements; nutrients; phosphorus; plant density; plant tissues; potassium; rain; seasonal variation; soil; soil nutrients; wildfires; zinc; Florida
Abstract:
... Investigations were conducted in 1971 and 1972 to characterize typical stands of sawgrass (Cladium jamaicense Crantz) in the southern Everglades. Estimates were obtained of standing crop, plant density, stem length, leaf numbers, growth rate, and nutrient relationships in plant tissue, soil, and water. Measurements were also made of daily rainfall and water depths. These various parameters were es ...
DOI:
10.2307/1935308

62. Automated Hydrolysis of Nonreducing Sugars and Fructosans from Plant Tissue

Author:
D. D. Wolf; T. L. Ellmore
Source:
Crop science 1975 v.15 no.6 pp. 775-777
ISSN:
0011-183X
Subject:
acid hydrolysis; automation; chemical analysis; filtration; forage; hot water treatment; plant tissues; starch; sucrose; water solubility
Abstract:
... Analytical procedures for chemical analysis of carbohydrates by measuring reducing power before and after hydrolysis, have been automated once the carbohydrates have been removed from the plant tissue. Sugars and fructosans were removed from forage tissue by hot water treatment. Reducing sugars in an aliquot were assayed by automated procedures without acid hydrolysis. Total water-soluble carbohyd ...
DOI:
10.2135/cropsci1975.0011183X001500060010x

63. An Automatic System for Sampling Processing Waste Water

Author:
H. D. Fisher; J. H. Smith
Source:
Soil Science Society of America journal 1975 v.39 no.2 pp. 382-384
ISSN:
0361-5995
Subject:
food processing; freezers; pipelines; prices; processing waste; wastewater
Abstract:
... The composition of waste water from food processing and other plants varies with time. A composite sample composed of smaller samples taken at different times will represent an average condition of these flows. The sampling system described in this paper will gather subsamples over a 24-hour or longer period and keep the composite sample frozen until ready for laboratory analysis. This system will ...
DOI:
10.2136/sssaj1975.03615995003900020043x

64. The Availability of Sludge-Borne Metals to Various Vegetable Crops

Author:
R. H. Dowdy; W. E. Larson
Source:
Journal of environmental quality 1975 v.4 no.2 pp. 278-282
ISSN:
0047-2425
Subject:
Lactuca sativa; bioaccumulation; cadmium; carrots; copper; corn; crop yield; edible fruits; fruiting; heavy metals; lettuce; peas; potatoes; radishes; sandy soils; sewage sludge; specific gravity; tubers; vegetable crops; vines; zinc
Abstract:
... The uptake of metals by seven vegetable crops was studied after 0, 112, 225, and 450 tonnes/ha (110C basis) of sewage sludge was applied to a coarse, sandy soil. Sewage sludge additions did not adversely affect either potato yields or specific gravity. Generally, metal contents of the vegetative tissue were higher than those of the fruiting, root, and tuber tissue. In most edible tissue heavy meta ...
DOI:
10.2134/jeq1975.00472425000400020032x

65. Availability of Water Absorbed by Hardwood Bark Soil Amendment

Author:
L. Art Spomer
Source:
Agronomy journal 1975 v.67 no.4 pp. 589-590
ISSN:
0002-1962
Subject:
Acer rubrum; Fraxinus americana; Juglans nigra; Platanus occidentalis; Populus; Quercus alba; Quercus rubra; bark; hardwood; soil amendments; water content; water potential
Abstract:
... This laboratory investigation determined the ‘availability’ of water absorbed by hardwood bark soil amendment. Water retention isotherms on a volumetric basis were determined on bark samples of seven different species (Fraxinus americana L., Populus deltioides Bartr., Acer rubrum L., Quercus rubra L., Platanus occidentalis L., Juglans nigra L., and Quercus alba L.) with a water pycnometer and a th ...
DOI:
10.2134/agronj1975.00021962006700040039x

66. Average Gene Frequency Estimates in Two Open-Pollinated Cultivars of Corn

Author:
C. L. Goodrich; R. E. Stucker; W. A. Compton
Source:
Crop science 1975 v.15 no.6 pp. 746-749
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... The purpose of this study was to obtain information on average gene frequency in two corn (Zea mays L.) populations. A design I mating system consisting of 100 males crossed to three females was developed in each of two open pollinated cultivars, ‘Golden Jewel’ and ‘Osterland's Yellow Dent.’ In addition, the male plants of the design I in each cultivar were selfed and crossed to females of the oth ...
DOI:
10.2135/cropsci1975.0011183X001500060002x

67. Die Bedeutung des Prevac-Verfahrens fur die Lasurbehandlung von Nadelholzern

Author:
Kyte, C.T.
Source:
European journal of wood and wood products 1975 v.33 no.3 pp. 94-96
ISSN:
0018-3768
Subject:
wood preservation
DOI:
10.1007/BF02607013

68. Behavioral Ecology of Mating in the Male Gila Topminnow, Poecilipsis Occidentalis (Cyprinodontiformes: Poeciliidae)

Author:
George D. Constanz
Source:
Ecology 1975 v.56 no.4 pp. 966-973
ISSN:
0012-9658
Subject:
Gila; Poeciliopsis; body size; ecology; females; fish; genes; growing season; males; sex ratio; sexual maturity; territoriality
Abstract:
... Males of the fish family Poeciliidae cease growth upon attainment of sexual maturity. Because position in fish social hierarchies is in large part size—dependent, Poeciliopsis occidentalis ♂ ♂ which mature at a small body size may be locked into subordinate status. As an apparent consequence of disparate competitive abilities, ♂ ♂ at extremes of body size exhibited contrasting mating strategies. F ...
DOI:
10.2307/1936307

69. Behaviour of young rhinoceros beetles, oryctes rhinoceros

Author:
ZELAZNY, B.
Source:
Entomologia experimentalis et applicata 1975 v. no. pp. 135-140
ISSN:
0013-8703
Subject:
Oryctes rhinoceros; eggs; females; insect flight; males; molting; pupation; young adults
Abstract:
... The behaviour of young adults of Oryctes rhinoceros was studied. In the field the young beetles remained at the site of pupation for 3--4 weeks after the adult moult. In the laboratory 3-week-old females and 5-week-oId males were able to mate before the first feeding and before the first flight. However, in the field mating apparently took place after the young beetles had left the site of pupatio ...
DOI:
10.1111/j.1570-7458.1975.tb02363.x

70. Bermudian Ants Revisited: The Status and Interaction of Pheidole Megacephala and Iridomyrmex Humilis

Author:
Ivan Lieberburg; Peter M. Kranz; Anne Seip
Source:
Ecology 1975 v.56 no.2 pp. 473-478
ISSN:
0012-9658
Subject:
Iridomyrmex; Linepithema humile; Pheidole megacephala; baiting; caves; surveys; Bermuda
Abstract:
... A survey of the distribution on Bermuda of the ant species Pheidole megacephala and Iridomyrmex humilis was conducted from August 6 to August 16, 1973. Based on 760 data points, Iridomyrmex appears to have established two new foci since 1966, one at Wreck Road and the other on the eastern end of St. Davids's Island, whereas Pheidole recaptured territory in the vicinity of Christ Church Leamington ...
DOI:
10.2307/1934979

71. The Biaxial Load-Extension Properties of Plain, Weft-Knitted Fabrics— A Theoretical Analysis

Author:
Brian M. Macrory; J. Roger McCraith; Aidan B. McNamara
Source:
Textile research journal 1975 v.45 no.10 pp. 746-760
ISSN:
0040-5175
Subject:
deformation; fabrics; textile fibers
Abstract:
... In this analysis the extension of a plain weft-knitted fabric, when subjected to biaxial loading, is investigated theoreti cally. The straightening of the coursewise and walewise elements of a half loop in the structure (which is the unit cell chosen) is considered, as is the slippage between loops. Various states of deformation of the fabric are considered, in particular the relaxed state, the fu ...
DOI:
10.1177/004051757504501009

72. Biochemical and Transplantation Studies of the Growth Form of Spartina alterniflora on Connecticut Salt Marshes

Author:
M. L. Shea; R. S. Warren; W. A. Niering
Source:
Ecology 1975 v.56 no.2 pp. 461-466
ISSN:
0012-9658
Subject:
Spartina alterniflora; ecotypes; electrophoresis; enzymes; grasses; littoral zone; physiological response; proteins; salt marshes; Connecticut; New England region
Abstract:
... In southern New England Spartina alterniflora occurs as a tall grass (1.25—2m) within the intertidal zone and as a short form (0.3—0.4 m) within pannes on the high marsh. By means of electrophoretic comparisons of total soluble proteins and selected enzymes, along with reciprocal field transplants, an attempt was made to clarify the ecotype versus ecophene status of these different forms. All data ...
DOI:
10.2307/1934977

73. Biochemical parameters in the patas monkey

Author:
Michael Paterson
Source:
Laboratory animals 1975 v.9 no.1 pp. 21-31
ISSN:
1758-1117
Subject:
chemistry; humans; laboratory animals; monkeys
Abstract:
... Various difficulties are encountered when applying certain routine clinical chemistry procedures to biological material from patas monkeys. The wide range of results found in the immature monkey, together with findings which in the human subject would be grossly abnormal, are described. ...
DOI:
10.1258/002367775780994916
PubMed:
804071

74. Biological Denitrification and Its' Application in Treatment of High-Nitrate Waste Water

Author:
C. W. Francis; M. W. Callahan
Source:
Journal of environmental quality 1975 v.4 no.2 pp. 153-163
ISSN:
0047-2425
Subject:
activated sludge; agricultural wastes; carbon; cations; denitrification; effluents; engineering; fertilizers; manufacturing; nitrate nitrogen; nitrates; nuclear fuels; uranium; wastewater
Abstract:
... One method of removing nitrate nitrogen from waste water effluents appears to be biological denitrification. Considerable research regarding denitrification of municipal and agricultural waste water containing relatively low concentrations of nitrate (<50 ppm NO₃-N) has been conducted. However, very little research has been carried out on the feasibility of applying the process to waste water effl ...
DOI:
10.2134/jeq1975.00472425000400020003x

75. Black Spruce Site Quality as Related to Soil and Other Site Conditions

Author:
G. L. Lowry
Source:
Soil Science Society of America journal 1975 v.39 no.1 pp. 125-131
ISSN:
0361-5995
Subject:
Picea mariana; environmental factors; humus; landforms; mineral soils; nitrogen; nutrients; phosphorus; prediction; site index; soil analysis; soil water; solar energy; tree growth; Canada
Abstract:
... Site factors were studied in relation to site index in 125 black spruce (Picea mariana Mill. BSP.) stands of eastern Canada. Site index was higher in the Continental than in the Atlantic Region, apparently due to differences in effective solar energy. In both regions site quality was related primarily to soil moisture and nutrients. Site index is better on freely drained, mesic mineral soils. Thes ...
DOI:
10.2136/sssaj1975.03615995003900010033x

76. Bonding of Calcium and Potassium by Vermiculite and Kaolinite Clays as Affected by H-clay Addition

Author:
A. S. Baweja; E. O. McLean
Source:
Soil Science Society of America journal 1975 v.39 no.1 pp. 48-50
ISSN:
0361-5995
Subject:
base saturation; bentonite; calcium; cations; clay; hydroxides; illite; kaolinite; mixing; pH; potassium; radioactivity; radionuclides; rubidium; tracer techniques; vermiculite
Abstract:
... The < 2 µm fraction of Libby vermiculite and Peerless kaolinite was separated and H-saturated by resin treatment. The H-clay suspensions were immediately saturated with either Ca or K by addition of the respective hydroxides. Six reciprocal Ca-K saturations of each clay were prepared by mixing the Ca- and K-clays in appropriate amounts. Increments of H-clay were added to lower the base saturation ...
DOI:
10.2136/sssaj1975.03615995003900010015x

77. Boron Application for Corn Grown on Selected Southeastern Soils

Author:
J. T. Touchton; F. C. Boswell
Source:
Agronomy journal 1975 v.67 no.2 pp. 197-200
ISSN:
0002-1962
Subject:
Zea mays; aluminum; application rate; barium; boron; calcium; coastal plains; copper; corn; crude protein; field experimentation; foliar spraying; iron; leaves; magnesium; manganese; piedmont soils; plant growth; plant tissues; potassium; sodium; strontium; zinc
Abstract:
... Some southeastern states recommend Boron application or Corn (Zea mays L.) while others with similar soils, do not. Certain soils are capable of providing an adequate supply of B for plant growth; others are not and require additional B. This study was initiated to determine the effects of B application to corn grown on two Coastal Plain and one Piedmont soil. The objectives were to investigate B ...
DOI:
10.2134/agronj1975.00021962006700020006x

78. Boron Source and Lime Effects on the Yield of Three Crops Grown in Peat

Author:
M. Prasad; E. Byrne
Source:
Agronomy journal 1975 v.67 no.4 pp. 553-556
ISSN:
0002-1962
Subject:
Solanum lycopersicum var. lycopersicum; Zea mays; boron; corn; crop yield; crops; cucumbers; greenhouse experimentation; mineral soils; peat; peat soils; sodium borate; sweetcorn; tomatoes; toxicity; water solubility
Abstract:
... The necessity of adding B in peat soils is recognized. A limited amount of information is available regarding toxic levels of B in these soils. A greenhouse experiment was therefore carried out to measure effects of three levels of lime × four levels of B (including control) × two types of B source on tomato (Lycopersicon esculentum Mill cv. Eurocross BB), cucumber (Curcumis sativus L. cv. Sporu), ...
DOI:
10.2134/agronj1975.00021962006700040025x

79. Boron Toxicity in Red Pine Following Municipal Waste Water Irrigation

Author:
Daniel G. Neary; G. Schneider; D. P. White
Source:
Soil Science Society of America journal 1975 v.39 no.5 pp. 981-982
ISSN:
0361-5995
Subject:
Pinus resinosa; borax; boron; discoloration; fertilizers; forests; growing season; humus; irrigation rates; leaves; mineral soils; municipal wastewater; necrosis; sprinkler irrigation; toxicity; wastewater irrigation
Abstract:
... Foliar boron toxicity symptoms, a needle tip necrosis and discoloration, appeared in a 20-year-old red pine plantation (Pinus resinosa Ait) after two growing seasons (a total of 34 weeks) of spray irrigation with municipal waste water. Irrigation rates of 25, 50, and 88 mm/week produced significant increases in the boron contents of current foliage, forest humus, and mineral soil. Foliage, humus a ...
DOI:
10.2136/sssaj1975.03615995003900050047x

80. Boron, Calcium, and Potassium Interactions in Spanish Peanuts

Author:
W. E. Hill; L. G. Morrill
Source:
Soil Science Society of America journal 1975 v.39 no.1 pp. 80-83
ISSN:
0361-5995
Subject:
Arachis hypogaea; application rate; boron; calcium; greenhouse production; greenhouses; gypsum; peanuts; potassium; sand; seed quality; seeds
Abstract:
... Experiments were conducted in the field and greenhouse to evaluate interactions between application of B, Ca (gypsum) and K upon yield and quality of ‘Comet’ variety Spanish peanuts (Arachis hypogaea). In the greenhouse, using Eufaula fine sand, peanuts received factorial treatment combinations of three rates of B (0, 0.25, and 0.50 ppm), three rates of Ca (0, 88, and 176 ppm as gypsum), and three ...
DOI:
10.2136/sssaj1975.03615995003900010023x

81. Bottom Fauna‐Substrate Relationships in a Northern Colorado Trout Stream: 1945 and 1974

Author:
James V. Ward
Source:
Ecology 1975 v.56 no.6 pp. 1429-1434
ISSN:
0012-9658
Subject:
bedrock; biomass; community structure; macroinvertebrates; pH; streams; temperature; trout; vegetation; Colorado
Abstract:
... A study of bottom fauna—substrate relationship conducted on North St. Vrain Creek, Colorado, USA in 1945 was repeated in 1974 to determine changes in the stream environment and in the community structure and standing crop of macroinvertebrates. The stream remains a clear, unpolluted trout stream with soft water of neutral pH. Despite differences in flow, temperature, and riparian vegetation, macro ...
DOI:
10.2307/1934710

82. Breeding Alfalfa Which Regenerates from Callus Tissue in Culture

Author:
E. T. Bingham; L. V. Hurley; D. M. Kaatz; J. W. Saunders
Source:
Crop science 1975 v.15 no.5 pp. 719-721
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Tetraplold alfalfa (Medicago sativa L.) germplasm, in which two-thirds of the plants are capable of regeneration from callus tissue in culture, has been developed by recurrent selection. It descends from one ‘DuPuits’ and four ‘Saranac’ clones which regenerated in the cycle 0 population. Frequency of regeneration was 12% in cycle 0, about 50% in cycle 1, and 67% in cycle 2. Seed produced by hand-i ...
DOI:
10.2135/cropsci1975.0011183X001500050032x

83. Breeding Potentials of Noncultivated Cottons. I. Some Agronomic and Fiber Properties of Selected Parents and Their F1 Hybrids

Author:
F. D. Wilson; R. L. Wilson
Source:
Crop science 1975 v.15 no.6 pp. 763-766
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Using a complete diallel set, we analyzed 12 agronomic and fiber characters in five cottons (Gossypium hirsutum L.), and their F₁ hybrids. Two of these were adapted cultivars, and the remainder were Texas race stocks. The cultivars were early and productive at Phoenix, whereas the three race stocks varied widely in earliness, lint characteristics, fruit size, growth habit, and other agronomic char ...
DOI:
10.2135/cropsci1975.0011183X001500060007x

84. Breeding and Postlarval Migrations of the Redspotted Newt, Notophthalmus Viridescens, in Massachusetts

Author:
William R. Healy
Source:
Ecology 1975 v.56 no.3 pp. 673-680
ISSN:
0012-9658
Subject:
Notophthalmus viridescens; breeding; females; gender differences; larvae; postlarvae; rain; salamanders and newts; Massachusetts
Abstract:
... Intrapopulation variation in migrant size and number was observed during a 2—yr study of the movement of efts and postlarval metamorphs at a pond in Charlton, Massachusetts. Rainfall strongly influenced the timing of both migrations and increased the growth rates of efts. In the wetter of the 2 yr efts were larger and more numerous, and the proportion of female migrants increased. Sex differences ...
DOI:
10.2307/1935501

85. Breeding nude (nu/nu) mice

Author:
C. M. Hetherington; Moira A. Hegan
Source:
Laboratory animals 1975 v.9 no.1 pp. 19-20
ISSN:
1758-1117
Subject:
females; heterozygosity; homozygosity; laboratory animals; males; mice; progeny; rearing; siblings; sires; thymus gland; weaning
Abstract:
... By using as sires homozygous nude males bearing thymus glands from their normal siblings, heterozygous females yield 50% nu/nu offspring under conventional conditions. Most nu/nu females are fertile, but in our experience only 20% of them rear nude litters to weaning age. ...
DOI:
10.1258/002367775780994907
PubMed:
1117693

86. Broadleaf Weed Control in Dormant Bermudagrass Turf

Author:
B. J. Johnson
Source:
Agronomy journal 1975 v.67 no.5 pp. 689-692
ISSN:
0002-1962
Subject:
2,4-D; Alchemilla; Cynodon dactylon; Hapludults; Lamium amplexicaule; Rhodudults; Stellaria media; Veronica; broadleaf weeds; cisanilide; corn; dicamba; lawns and turf; mecoprop; methazole; paraquat; pesticide application; propionic acid; silvex; turf grasses; weed control; winter
Abstract:
... Broadleaf weeds continue to be a major problem in turfgrass during mild winters throughout the Southeast. Therefore, experiments were conducted with herbicides applied postemergence to determine the maximum weed control with the least amount of chemical treatment. Two new herbicides alone with presently available chemicals were applied to dormant bermudagrass [Cynodon dactylon L. Pers.] in singly ...
DOI:
10.2134/agronj1975.00021962006700050027x

87. Brucella abortus biotype 1 as a cause of abortion in a bitch

Author:
Taylor, D.J.; Renton, J.P.; McGregor, A.B.
Source:
Veterinary record 1975 v.96 no.19 pp. 428-429
ISSN:
0042-4900
Subject:
agglutination tests; signs and symptoms (animals and humans); fetal death; disease diagnosis; tissue culture; dogs; case studies; Scotland
DOI:
10.1136/vr.96.19.428
PubMed:
806159

88. Bulk Density Sampler for Deep Soil Profiles

Author:
K. M. Holtzclaw; J. M. Rible; P. F. Pratt
Source:
Soil Science Society of America journal 1975 v.39 no.6 pp. 1220-1223
ISSN:
0361-5995
Subject:
bulk density; drilling; soil profiles; soil sampling
Abstract:
... A bulk density sampler, adapted from a conventional commercial type, was constructed and used to obtain soil samples at more than 50 sampling sites from depths to 30 m. This sampler increased the speed with which samples were taken because it was readily added to or detached from the drilling unit between sequences of drilling. Evaluations showed that the sampler obtained bulk density values quite ...
DOI:
10.2136/sssaj1975.03615995003900060050x

89. Cadmium and Zinc Contents of Corn Leaf and Grain Produced by Sludge-amended Soil

Author:
Robert L. Jones; T. D. Hinesly; E. L. Ziegler; J. J. Tyler
Source:
Journal of environmental quality 1975 v.4 no.4 pp. 509-514
ISSN:
0047-2425
Subject:
Zea mays; anaerobic digestion; cadmium; corn; leaves; liquids; silt loam soils; sludge; soil pH; zinc
Abstract:
... Liquid digested sludge (heated anaerobic digestion) was incorporated at different rates in Blount silt loam over 3 and 4 years. Cadmium and Zn were determined in corn ear leaf at tassel and in grain (Zea mays L.) in 1971 and 1972. Cadmium and Zn extractable from soil with 0.1/V HCI were also estimated. The elements increased in soil and tissue with sludge application. Cadmium in leaf was not affec ...
DOI:
10.2134/jeq1975.00472425000400040018x

90. Cadmium-zinc interactions: implications for health

Author:
Sandstead, H.H.; Klevay, L.M.
Source:
Trace Element Geochemistry in Health & Disease / J. Freedman, ed 1975 pp. 73-81
ISSN:
0072-1077
Subject:
epidemiological studies; health effects assessments; public health; zinc; nutrient-nutrient interactions; cadmium; dietary exposure; dietary minerals
Abstract:
... INTRODUCTION Cadmium and zinc are chemically similar (Cotzias and others, 1961; Cotton and Wilkinson, 1966). They therefore compete with one another for a variety of ligands (Pulido and others, 1966a; Gunn and others, 1968). Because cadmium is considered to have only adverse effects in biological systems (Friberg and others, 1971) and zinc is an essential nutrient (Sandstead, 1973), the significan ...
Handle:
10113/44821
DOI:
10.1130/SPE155-p73

91. Calculated Drainage Water Compositions and Salt Burdens Resulting from Irrigation with River Waters in the Western United States

Author:
J. D. Oster; J. D. Rhoades
Source:
Journal of environmental quality 1975 v.4 no.1 pp. 73-79
ISSN:
0047-2425
Subject:
alfalfa; aragonite; carbon dioxide; computer simulation; drainage water; electrical conductivity; gypsum; hydraulic conductivity; irrigation; irrigation water; leaching; lysimeters; magnesium; partial pressure; pollution; regression analysis; river water; rivers; salinity; salt tolerance; simulation models; sodicity; sodium; sodium adsorption ratio; soil solution; solubility; sulfates; water quality; Western United States
Abstract:
... Drainage water compositions were calculated with a computer simulation model from irrigation water compositions, leaching fractions, aragonite and gypsum solubilities, and measured partial pressure of CO₂. The calculated compositions were compared with measured values obtained from lysimeters filled with Pachappa soil, cropped with alfalfa, and irrigated with eight synthetic waters typical of rive ...
DOI:
10.2134/jeq1975.00472425000400010017x

92. Calculation of Rate of Nutrient Uptake by Growing Roots

Author:
F. E. Khasawneh
Source:
Agronomy journal 1975 v.67 no.4 pp. 574-576
ISSN:
0002-1962
Subject:
equations; frequency distribution; nutrient uptake; root systems; roots; time series analysis
Abstract:
... Equations are presently available to calculate the rate of nutrient uptake by growing roots. They can be used to estimate an average rate of uptake by the entire root system, but they fail to give specific information on uptake by a unit segment of root or on the effects of aging and morphological changes of such a segment on its capacity for uptake. This paper gives a theoretical analysis of the ...
DOI:
10.2134/agronj1975.00021962006700040032x

93. Cannabinoid Profile and Elemental Uptake of Cannabis sativa L. as Influenced by Soil Characteristics

Author:
C. B. Coffman; W. A. Gentner
Source:
Agronomy journal 1975 v.67 no.4 pp. 491-497
ISSN:
0002-1962
Subject:
Cannabis sativa; cannabidiol; chemical analysis; greenhouses; harvesting; leaf analysis; leaves; phosphorus pentoxide; plant height; product authenticity; provenance; soil pH; tetrahydrocannabinol; traffic
Abstract:
... The consumption of Cannabis products (marihuana) derived from domestic and foreign sources persists in the United States despite its illegality and health hazards. The objectives of this investigation were: 1) to evaluate relationships between soil and plant elements, cannabinoids, and growth of Cannabis sativa L., and 2) to evaluate the practicality of using chemical analysis of Cannabis products ...
DOI:
10.2134/agronj1975.00021962006700040010x

94. Canopy Lichens with Blue‐Green Algae: A Nitrogen Source in a Colombian Rain Forest

Author:
Richard T. T. Forman
Source:
Ecology 1975 v.56 no.5 pp. 1176-1184
ISSN:
0012-9658
Subject:
Nostoc; biomass; branches; canopy; epiphytes; forest ecosystems; lichens; nitrogen; nitrogen content; nitrogen fixation; rain forests; trees; tropics
Abstract:
... Lichens containing blue—green algae are abundant (13,600/ha; total biomass 5.7 kg/ha) in a Colombian montane rain forest. These noncrustose lichens grow mainly on 3—12 cm diam twigs and small branches, 12—25 m high at the top of the crowns of canopy and subcanopy trees. They are rare below 4 m. Eighty—six % of the lichens contain Nostoc and, based on published laboratory nitrogen—fixation studies ...
DOI:
10.2307/1936157

95. Capillary Sorption Hysteresis Losses in Fibrous Assemblies

Author:
John Skelton
Source:
Textile research journal 1975 v.45 no.7 pp. 540-542
ISSN:
0040-5175
Subject:
absorption; energy; fabrics; hysteresis; models; textile fibers
Abstract:
... The energy loss associated with the reorganization of the elements of a fibrous assembly by the absorption of liquids , has been calculated using a simplified model of the assembly, and has been shown to be in reasonable agreement with previously reported experimental values of this parameter. ...
DOI:
10.1177/004051757504500705

96. The Capitalization of Real Property Taxes Levied on Farm Real Estate

Author:
E. C. Pasour Jr.
Source:
American journal of agricultural economics 1975 v.57 no.4 pp. 539-548
ISSN:
0002-9092
Subject:
agricultural productivity; farm size; farms; property tax; United States
Abstract:
... The capitalization of changes in property taxes levied on farm real estate is investigated. The per acre value of farm real estate in the United States is estimated as a function of the effective tax rate and as a function of three categories of independent variables which are related to agricultural productivity, farm size, and urban influence in a cross‐section study. The effect of anticipated a ...
DOI:
10.2307/1238871

97. Carbon Dioxide Enrichment Effects Upon Yield and Yield Components in Wheat

Author:
E. G. Krenzer; Dale N. Moss
Source:
Crop science 1975 v.15 no.1 pp. 71-74
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Two hard red spring wheat (Triticum aestivum L.) genotypes, the commercial variety ‘Era’ and an experimental genotype ‘8037,’ selected for this work because it had unusually large heads, were grown in normal air and in atmospheres enriched in CO₂ to 600 ppm by volume in the field and in growth chambers in two day/night temperature regimes of 25/20 and 13/17 C. The growth period was divided into th ...
DOI:
10.2135/cropsci1975.0011183X001500010020x

98. Carbon-14 Assimilate Translocation in Nodulated and Nonnodulated Soybeans

Author:
W. J. Russell; D. R. Johnson
Source:
Crop science 1975 v.15 no.2 pp. 159-161
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Nodulating and nonnodulating soybean [Glyclne max (L.) Merr.] isolines were grown for 30 days in silica sand in the greenhouse with 0, 50, and 100 μg N/g sand to evaluate ¹⁴C translocation in plants dependent solely on N fixation or nitrate uptake or both. No differences were observed between the two geno. type's translocation patterns at the vegetative stage, when they are totally dependent on so ...
DOI:
10.2135/cropsci1975.0011183X001500020004x

99. Caste determination through a queen influence on diapause in larvae of the ant myrmica rubra

Author:
BRIAN, M.V.
Source:
Entomologia experimentalis et applicata 1975 v. no. pp. 429-442
ISSN:
0013-8703
Subject:
Myrmica rubra; appetite; caste determination; diapause; females; larvae; pharynx; sugars
Abstract:
... Presence of queens decreases the incidence of diapause in last-instar larvae and thereby increases the production of workers as opposed to sexual females. Neither removal of the mandibular nor pharyngeal glands from nursing workers nor application of the contents to larvae increases the proportion that pupate, but prey and especially water supply both do. Queens, even dead ones, increase the amoun ...
DOI:
10.1111/j.1570-7458.1975.tb00420.x

100. Cation Concentrations and K to CA + MG Ratio of Nine Cool-Season Grasses and Implications with Hypomagnesaemia

Author:
James L. Thill; J. R. George
Source:
Agronomy journal 1975 v.67 no.1 pp. 89-91
ISSN:
0002-1962
Subject:
Agropyron cristatum; Alopecurus pratensis; Arrhenatherum elatius; Bromus inermis; Dactylis glomerata; Elymus canadensis; Phalaris arundinacea; Poa pratensis; Thinopyrum elongatum; air temperature; calcium; cold season; cool season grasses; forage grasses; grass tetany; grazing; livestock; magnesium; nutrient deficiencies; pastures; potassium; risk; ruminants; spring
Abstract:
... Reports of hypomagnesaemia, a Mg deficiency in ruminants, occur most frequently when livestock graze the spring growth of grass pastures. To minimize these animal losses it is important to know whether differences exist among forage grasses for potential risk of Mg deficiency in ruminant livestock. The objectives of this study were 1) to determine if several cool-season forage grasses accumulate K ...
DOI:
10.2134/agronj1975.00021962006700010025x