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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