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1. "Newer" trace elements in nutrition

Author:
Neilsen, F.H.; Hopkins, L.L.
Source:
Official proceedings of the annual meeting 1973 v.21st pp. 35-52
ISSN:
0569-2628
Subject:
Estimated Average Requirement; animal nutrition; growth and development; Adequate Intakes; animal reproduction; tin; bone mineralization; livestock; dietary nutrient sources; nutrient requirements; vanadium; nickel; cholesteremic effect; nutrition research; fluorine
Handle:
10113/48225

2. ALMI-Set Process:A New Approach to Carefree Garments

Author:
George L. Payet
Source:
Textile research journal 1973 v.43 no.4 pp. 194-197
ISSN:
0040-5175
Subject:
clothing; fabrics; textile fibers; washing
Abstract:
... A SO₂-catalyzed vapor-phase formaldehyde-crosslinking process was commercialized by the ALMI-Set Process. The reactor gives garments of unusual ability to wash and dry and to be wrinkle-free. ...
DOI:
10.1177/004051757304300402

3. Abscission Processes in Cotton: Induction by Plant Water Deficit

Author:
B. L. McMichael; W. R. Jordan; R. D. Powell
Source:
Agronomy journal 1973 v.65 no.2 pp. 202-204
ISSN:
0002-1962
Subject:
Gossypium hirsutum; bolls; cotton; greenhouses; growth habit; juveniles; leaf abscission; leaf water potential; leaves; sand; water stress
Abstract:
... Premature boll shedding is characteristic of the cotton (Gossypium hirsutum L.) growth habit, but the extent of this shedding is quite variable. This study was undertaken to evaluate the effects of water stress on boll and leaf abscission. The experiments were conducted in a greenhouse using plants grown in pots containing sand. Plant water deficits were induced by withholding water. Leaf water po ...
DOI:
10.2134/agronj1973.00021962006500020005x

4. Absorption of 2,4-dichlorophenoxyacetic acid and 3-(p-chlorophenyl)-1,1-dimethylurea (Monuron) by barley roots

Author:
Donaldson, T.W.; Bayer, D.E.; Leonard, O.A.
Source:
Plant physiology 1973 v.52 no.6 pp. 638-645
ISSN:
0032-0889
Subject:
Hordeum vulgare; barley; roots; 2,4-D; monuron; uptake mechanisms
DOI:
10.1104/pp.52.6.638
PubMed:
16658621

5. Absorption of Mercuric Cation by Tannins in Agricultural Residues

Author:
A. C. Waiss; M. E. Wiley; J. A. Kuhnle; A. L. Potter; R. M. McCready
Source:
Journal of environmental quality 1973 v.2 no.3 pp. 369-371
ISSN:
0047-2425
Subject:
absorbents; absorption; agricultural wastes; bark; cations; grape pomace; heavy metals; hulls; ion exchange; manufacturing; mercury; mining; pectins; pollutants; tannins; wastewater
Abstract:
... Two common environmental pollutants are agricultural residues (skins, pits, husks, tannin bark, grape pomace) and waste streams of water containing only traces of heavy metals (such as mercury at 10 or more ppb) from mining or manufacturing operations. Agricultural residues contain tannins, polyphenolic substances, pectin, and other polymers—all with chemically reactive groups that can chelate, re ...
DOI:
10.2134/jeq1973.00472425000200030015x

6. Accumulated Heat Units for Classifying Corn Hybrid Maturity

Author:
H. J. Mederski; M. E. Miller; C. R. Weaver
Source:
Agronomy journal 1973 v.65 no.5 pp. 743-747
ISSN:
0002-1962
Subject:
Zea mays; climatic factors; corn; heat; phenology; plant development; planting date; prediction; seeds; Ohio
Abstract:
... Previous studies comparing the accumulated heat unit (AHU) method with the calendar day method for classifying corn (Zea mays L.) hybrids with respect to maturity do not clearly show the superiority of the AHU method over the calendar day method. They appear to have two limitations: (1) the range of climatic conditions under which the studies were conducted was not broad enough to elicit wide vari ...
DOI:
10.2134/agronj1973.00021962006500050020x

7. Accumulation of Dry Matter and Nitrogen Content of Burley Tobacco Growing in Fertilizer-induced Acid Soil

Author:
J. L. Sims; W. O. Atkinson
Source:
Agronomy journal 1973 v.65 no.5 pp. 762-765
ISSN:
0002-1962
Subject:
Nicotiana; acid soils; burley tobacco; dry matter accumulation; fertilizer rates; flowering; growing season; leaves; manganese; nitrogen compounds; nitrogen fertilizers; total nitrogen; toxicity
Abstract:
... Nicotiana tabarum L. cv. ‘Burley 21’ was grown in the field to determine the influence of rate of N fertilization on accumulation of dry matter and certain nitrogenous constituents during the growing season. Nitrogenous compounds in tobacco are presently of interest from a human health standpoint and the chemical constituents of tobacco leaves are known to be associated with dry matter accumulatio ...
DOI:
10.2134/agronj1973.00021962006500050026x

8. Accumulation of toxic levels of phosphorus in the leaves of phosphorus-deficient barley

Author:
Green, D.G.; Ferguson, W.S.; Warder, F.G.
Source:
Canadian journal of plant science 1973 v.53 no.2 pp. 241-246
ISSN:
0008-4220
Subject:
plant damage
DOI:
10.4141/cjps73-045

9. Accumulative Effects of Manure and N on Continuous Corn and Clay Soil. II. Chemical Changes in Soil

Author:
J. L. McIntosh; K. E. Varney
Source:
Agronomy journal 1973 v.65 no.4 pp. 629-633
ISSN:
0002-1962
Subject:
Zea mays; ammonium acetate; application rate; calcium; clay soils; corn; crops; dairy manure; exchangeable sodium; iron; magnesium; manganese; manure spreading; nutrient content; nutrient uptake; organic matter; pH; phosphorus fertilizers; potassium; sodium; soil amendments
Abstract:
... Continuous corn (Zea mays L.) was grown on a Panton clay soil (Typic Ochraqualf). Four rates of manure (0, 22, 44, and 66 tons/ha) and five rates of N (0, 56, 112, 168, and 224 kg/ha) were combined in a factorial arrangement and applied each year to the same plots. Also, 120 kg/ha of P and 90 kg/ha of K were applied for 4 years to all plots. Maintenance of structure and fertility had been difficul ...
DOI:
10.2134/agronj1973.00021962006500040030x

10. Acetylcholinesterase Toxicity of Malathion and Its Metabolites

Author:
W. W. Walker; B. J. Stojanovic
Source:
Journal of environmental quality 1973 v.2 no.4 pp. 474-475
ISSN:
0047-2425
Subject:
Arthrobacter; acetylcholinesterase; cattle; dicarboxylic acids; enzyme inhibition; laboratory experimentation; malathion; metabolites; potassium; toxicity
Abstract:
... Malathion, under in vitro laboratory conditions, is readily degraded by an Arthrobacter species to four metabolites—malathion half-ester, malathion dicarboxylic acid, potassium dimethyl phosphorothioate, and potassium dimethyl phosphorodithioate. However, it is not clear whether or not this degradation represents a simultaneous detoxication of the malathion molecule. With this in mind, the relativ ...
DOI:
10.2134/jeq1973.00472425000200040015x

11. Acetylene-Ethylene Assay Studies on Excised Root Nodules of Myrica asplenifolia L.

Author:
R. J. Fessenden; R. Knowles; R. Brouzes
Source:
Soil Science Society of America journal 1973 v.37 no.6 pp. 893-898
ISSN:
0361-5995
Subject:
Comptonia peregrina; acetylene; acetylene reduction; diurnal variation; ethylene; nitrogen; oxygen; root nodules; stable isotopes
Abstract:
... The acetylene-reducing activity of excised root nodules of Myrica asplenifolia L. [Comptonia peregrina (L.) Coult.] was measured on a large number of samples both in the field and in the laboratory. The apparent Kₘ for acetylene was determined to be 0.006 atm and was not significantly different in the presence or in the absence of 0.8 atm of N₂. Maximum activity was obtained between 26 and 30C and ...
DOI:
10.2136/sssaj1973.03615995003700060029x

12. Acetylene-Reduction Assay of Anaerobic Nitrogen Fixation by Sediments of Selected Wisconsin Lakes

Author:
A. N. Macgregor; D. R. Keeney
Source:
Journal of environmental quality 1973 v.2 no.4 pp. 438-440
ISSN:
0047-2425
Subject:
acetylene reduction; enzyme inhibitors; lakes; methane; nitrogen fixation; nitrogenase; sediments; trophic levels; Wisconsin
Abstract:
... Sediments from two hardwater and six softwater lakes of varying trophic levels from Wisconsin were incubated under conditions which permitted continued synthesis of methane. Rates of acetylene reduction indicated that, on the average, sediments from hardwater and softwater lakes may fix 37 and 7.7 ng of N, respectively, per gram (dry weight) per day. The rate of acetylene reduction diminished in t ...
DOI:
10.2134/jeq1973.00472425000200040005x

13. Acetylenic acids of Alvaradoa amorphoides seed oil

Author:
Pearl, M.B.; Kleiman, R.; Earle, F.R.
Source:
Lipids 1973 v.8 no.11 pp. 627-630
ISSN:
0024-4201
Subject:
fatty acid composition; seed oils; monounsaturated fatty acids; fatty acid esters; Alvaradoa amorphoides; acetylene; Mexico
Handle:
10113/31064
DOI:
10.1007/BF02533146

14. Activated Imines as Intermediates in Base-Catalyzed Crosslinking of Cotton by N-Methylol Agents

Author:
Clark M. Welch; Matthew F. Margavio
Source:
Textile research journal 1973 v.43 no.9 pp. 495-502
ISSN:
0040-5175
Subject:
catalysts; catalytic activity; cellulose; cross-linking reagents; crosslinking; dyes; fabrics; imines; lint cotton; moieties; silicone; temperature; textile fibers; urea
Abstract:
... Certain N-methylolamides crosslink cotton cellulose at very moderate temperatures (105°-130°C) in the presence of alkaline catalysts, without the fabric yellowing that is usually associated with alkaline curing. Evidence is presented that the active crosslinking agents are alpha-, beta-unsaturated imines possessing CH₂=N—C=O groups, and that these undergo base-catalyzed, Michael-type addition to c ...
DOI:
10.1177/004051757304300901

15. Activation Analysis of Aluminum from Water Extract of Soil

Author:
U. K. Misra; E. R. Graham; W. J. Upchurch; D. M. McKown
Source:
Soil Science Society of America journal 1973 v.37 no.2 pp. 193-196
ISSN:
0361-5995
Subject:
aluminum; anion exchange resins; chlorides; gamma radiation; half life; leaching; lysimeters; manganese; nitrates; silica; silicon; soil water
Abstract:
... Determination of low-level Al in soil water extracts or lysimeter leachings requires a method extremely sensitive in the ppb range. ₁₃²⁷Al(n,γ)₁₃²⁸Al is rapid and convenient because it has a high cross section and a short half life. ²⁸Al may also be produced by ₁₄²⁸Si(n,p)₁₃²⁸Al. Hence a correction must be made by determining Si colorimetrially and finding the counts due to Si from a standard grap ...
DOI:
10.2136/sssaj1973.03615995003700020013x

16. Activity of Barley Seedling Roots as Measured by Strontium Uptake

Author:
J. M. Soileau
Source:
Agronomy journal 1973 v.65 no.4 pp. 625-628
ISSN:
0002-1962
Subject:
Hordeum vulgare; barley; calcium; crops; exchangeable calcium; fertilizers; greenhouses; magnesium; nutrient uptake; rhizosphere; root growth; roots; seedlings; soil depth; soil-plant interactions; strontium; strontium carbonate
Abstract:
... Root activity at various depths in soils is important in relation to effective use of lime and fertilizers by crops. Barley (Hordeum vulgare L.) seedlings were grown in presplit cylinders in the greenhouse to measure root activity in three 10-cm soil depth zones and to estimate daily rates of nutrient uptake. Twenty-five seedlings were planted per 15 ✕ 30 cm cylinder containing 6.5 kg of soil. SrC ...
DOI:
10.2134/agronj1973.00021962006500040029x

17. The Activity of Individual Molecules of Hybrid β-Galactosidase Reconstituted from the Wild-Type and an Inactive-Mutant Enzyme

Author:
Melchers, Fritz; Messer, Walter
Source:
European journal of biochemistry 1973 v.34 no.2 pp. 228-231
ISSN:
0014-2956
Subject:
Escherichia; active sites; beta-galactosidase; enzyme activity; hybrids; mutants
Abstract:
... A technique capable of detecting individual molecules of β-galactosidase has been used to measure the enzyme activity of single hybrid β-galactosidase molecules reconstituted from mixtures of varying proportions of wild-type and lac⁻ aba mutant enzyme. Reconstituted molecules exhibit activities of 0, 1/4, 2/4, 3/4, 4/4 of the wild-type enzyme, depending on the ratio of wild-type to mutant subunits ...
DOI:
10.1111/j.1432-1033.1973.tb02750.x

18. Activity of juvenile hormone analogues against the tobacco budworm

Author:
Guerra, A.A.; Wolfenbarger, D.A.; Garcia, R.D.
Source:
Journal of economic entomology 1973 v.66 no.4 pp. 833-835
ISSN:
0022-0493
Subject:
Gossypium; Heliothis virescens; larvae; pupae; fecundity; juvenile hormones; pest control; Texas
DOI:
10.1093/jee/66.4.833

19. THE Actographic examination of flight activity of the cocoa mirid distantiella theobroma (hemiptera: miridae)

Author:
KING, A.B.S.
Source:
Entomologia experimentalis et applicata 1973 v. no. pp. 53-63
ISSN:
0013-8703
Subject:
Distantiella theobroma; adults; insect flight; light intensity; males; virgin females
Abstract:
... The patterns of flight activity of adult Distantiella theobroma were recorded in an actograph placed in the field. Flight activity of virgin females showed a non-linear increase with age, was highest around mid-day and related to sex attraction behaviour. Mated females and males both showed sharp peaks of activity in the late afternoons. Male flight was depressed by low light intensities and all a ...
DOI:
10.1111/j.1570-7458.1973.tb00248.x

20. Acylated steryl glucosides from soybean globulins: isolation and characterization

Author:
Wolf, W.J.; Thomas, B.W.
Source:
Cereal chemistry 1973 v.50 no.5 pp. 580-589
ISSN:
0009-0352
Subject:
phytosterols; linoleic acid; globulins; linolenic acid; fatty acid composition; glucose; soybeans; glucosides
Abstract:
... Previous studies showed that isolated soybean proteins contain materials extractable with aqueous alcohols consisting of phosphatides, saponins, β-sitosteryl glucoside, genistein, triglycerides, and unidentified compounds. Acylated steryl glucosides have now been identified as an additional fraction of the materials extractable with 86% (v/v) ethanol from freeze-dried acid-precipitated soybean glo ...
Handle:
10113/31057

21. Adaptational Biology and Energy Relationships of the Collared Peccary (Tayassu Tajacu)

Author:
Stam M. Zervanos; Neil F. Hadley
Source:
Ecology 1973 v.54 no.4 pp. 759-774
ISSN:
0012-9658
Subject:
urine; thermoregulation; water requirement; evaporation; summer; Opuntia; thermal conductivity; animals; feces; setae (animal); energy; winter; fur; herds; heat; temperature; energy requirements; wildlife; Pecari tajacu; environmental factors; color; home range
Abstract:
... Field and laboratory investigations were conducted to determine the major seasonal adaptations exhibited by the collared peccary (Tayassu tajacu) in the desert. Emphasis was placed on the animal's thermoregulation, water relations, and energy requirements under changing environmental conditions. Body core temperatures were labile and ranged from 37.5 degrees C to approximately 40.9 degrees C durin ...
DOI:
10.2307/1935671

22. Adaptive Variation in Size of Cricket Frogs

Author:
Eviatar Nevo
Source:
Ecology 1973 v.54 no.6 pp. 1271-1281
ISSN:
0012-9658
Subject:
Acris crepitans; Neobatrachia; biogeography; body size; body weight changes; climate; correlation; frogs; geographical variation; grasslands; humidity; jumping; longitude; predation; rain; regression analysis; sibling species; temperature; variance; woodlands; North America
Abstract:
... Geographic variation in body size (BL) and relative foot size (F/B) was studied across the ranges of two sibling species of cricket frogs, genus Acris (Hylidae)in North America. Acris crepitans has a large range in eastern and central states extending from mesic woodlands to xeric grasslands, whereas A. gryllus has a limited range in southeastern states in mesic woodlands. Measurements of BL and F ...
DOI:
10.2307/1934189

23. Adaxial and Abaxial Stomatal Resistance of Cotton in the Field

Author:
Peter J. H. Sharpe
Source:
Agronomy journal 1973 v.65 no.4 pp. 570-574
ISSN:
0002-1962
Subject:
Gossypium hirsutum; ambient temperature; cotton; drought; lysimeters; soil water; stomata; stomatal conductance; stomatal movement; water stress; Australia
Abstract:
... An experiment was conducted near. Sydney, Australia to determine the adaxial and abaxial stomatal responses of cotton (Gossypium hirsutum L.) to environmental factors under noncycling field conditions. Cotton plants were grown in small lysimeter pans and transpiration was measured by strain guage lysimeters. Leaf temperature, ambient temperature and other micrometeorological parameters were monito ...
DOI:
10.2134/agronj1973.00021962006500040014x

24. Adsorption of Particulate Solids on Textiles1

Author:
Erik Kissa
Source:
Textile research journal 1973 v.43 no.2 pp. 86-95
ISSN:
0040-5175
Subject:
adhesion; adsorption; cellulose; chemical composition; desorption; fabrics; hydrophilicity; hydrophobicity; impellers; particulates; soil; textile fibers
Abstract:
... Adsorption uf particulate solids and synthetic soil on cellulose and synthetic fabrics has been studied by a dynamic method involving high speed rotation of the solid and the substrate in a closed chamber. The results confirm that adhesion, and not mechanical entrapment, is the dominant soiling mechanism. Adsorption of particulate matter on the fiber surface increases with increasing pressure and ...
DOI:
10.1177/004051757304300205

25. Adsorption of Picloram (4-Amino-3,5,6-Trichloropicolinic Acid) on Panoche, Ephrata, and Palouse Soils: A Thermodynamic Approach to the Adsorption Mechanism

Author:
J. W. Biggar; M. W. Cheung
Source:
Soil Science Society of America journal 1973 v.37 no.6 pp. 863-868
ISSN:
0361-5995
Subject:
Gibbs free energy; adsorption; clay loam soils; enthalpy; entropy; pH; picloram; sandy loam soils; silt loam soils; sorption isotherms
Abstract:
... The adsorption of picloram (4-amino-3,5,6-trichloropicolinic acid) was studied on Panoche clay loam (at pH 4.2 and 1.2), Ephrata sandy loam, and Palouse silty loam. The adsorption processes could be described by the Freundlich equation with Freundlich constants, K, 1/n, and percentage of adsorption at 25C: respectively, 0.210, 0.92, and 3–5.6% for Panoche at pH 4.2; 2.5, 0.93, and 30% for Panoche ...
DOI:
10.2136/sssaj1973.03615995003700060022x

26. Advances in the study of benthic marine algae since the time of E. M. Holmes

Author:
PRICE, J.H.
Source:
Botanical journal of the Linnean Society 1973 v.67 no.1 pp. 47-102
ISSN:
0024-4074
Subject:
herbaria; attitudes and opinions; traditions; British Isles
Abstract:
... E. M. Holmes's major interests in the marine benthic algae were, like those of most of his contemporaries, taxonomic and floristic; he was much occupied with the acquisition, for areas of the British Isles, of new records of species known already elsewhere. Records established by Holmes and his contemporaries have increasingly been subjected to examination by means of more recent laboratory and fi ...
DOI:
10.1111/j.1095-8339.1973.tb01731.x

27. Adventitious Bud Development of Soybean Hypocotyl Sections in Culture

Author:
S. L. Kimball; E. T. Bingham
Source:
Crop science 1973 v.13 no.6 pp. 758-760
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Tissue culture methods were used to study the capacity of soybean (Glycine max (L.) Merrill) to differentiate adventitious buds. Hypocotyl sections from the cultivar ‘Dunn’ were placed on various media for preliminary observations, and ‘Corsoy’ was tested later to determine if ‘Dunn’ responses were variety-specific. Those sections placed on media containing 0.5 to 2.0 mg/liter 2,4-dichlorophenoxya ...
DOI:
10.2135/cropsci1973.0011183X001300060053x

28. Aerodynamic and Energy Balance Comparisons Between Awned and Nonawned Barley

Author:
J. F. Benci; J. K. Aase; A. H. Ferguson
Source:
Agronomy journal 1973 v.65 no.3 pp. 373-377
ISSN:
0002-1962
Subject:
Hordeum vulgare; aerodynamics; awns; barley; canopy; energy balance; heat transfer; isogenic lines; latent heat; net radiation; roughness length; turbulent flow
Abstract:
... The objective of the study was to evaluate the influence of awning characteristics of barley (Hordeum vulgare L.) on the partitioning of the heat load and the turbulent characteristics of the lower atmospheric boundary associated with the plant canopy. Aerodynamic studies of full-awned, half-awned, and nonawned isogenic barley indicated that awns increased the roughness length for the barley canop ...
DOI:
10.2134/agronj1973.00021962006500030008x

29. Affinities of the Heterostraci (Agnatha)

Author:
Source:
Biological journal of the Linnean Society 1973 v.5 no.4 pp. 339-349
ISSN:
0024-4066
Subject:
Agnatha; animal morphology; animal taxonomy; bones; evolution; gills; morphometry
Abstract:
... From a study of the perforations in the heterostracan carapace and the impressions on the inner surface of the bony plates it is suggested that the Heterostraci in most features belonged to a structural stage from which it was possible to derive both the gnathostomes and the cyclostomes (including the cephalaspids and anaspids). However, the structure of the gills and the presence of a spiracle in ...
DOI:
10.1111/j.1095-8312.1973.tb00709.x

30. Aflatoxin M1 in milk: evaluation of methods

Author:
Stubblefield, R.D.; Shannon, G.M.; Shotwell, O.L.
Source:
Journal of the Association of Offical Analytical Chemists 1973 v.56 no.5 pp. 1106-1110
ISSN:
0004-5756
Subject:
aflatoxin M1; milk analysis; food contamination; dried milk; milk; extraction; methanol; chemical precipitation; milk proteins; thin layer chromatography
Abstract:
... 6 published methods for the determination of aflatoxin M1 in liquid and dried milk were compared because a quantitative assay sensitive to 0.1 mu g/l. was needed for routine analysis. Each method was tested with both spiked and naturally contaminated samples at levels of 0.1, 0.5, and 1 mu g/l. or 1, 5, and 10 mu g/kg; recoveries of M1 were determined. Data revealed that 2 methods, one for liquid ...
Handle:
10113/31550

31. Aflatoxin and anthraquinone biosynthesis by nitrosoguanidine-derived mutants of Aspergillus parasiticus

Author:
Detroy, R.W.; Freer, S.; Ciegler, A.
Source:
Canadian journal of microbiology 1973 v.19 no.11 pp. 1373-1378
ISSN:
0008-4166
Subject:
Aspergillus parasiticus; mutants; mutagenesis; N-methyl-N-nitrosoguanidine; aflatoxins; anthraquinones; biosynthesis; pigments; microbial physiology
Abstract:
... The cedar extractive β thujaplicin was shown to inhibit the growth of a wide variety of bacterial species, and to be bactericidal for several species. The compound caused the lysis of cells of several species of Gram negative bacteria. The antibacterial activity of β thujaplicin was quantitated by agar diffusion and tube dilution assays, and shown to be less potent than sodium penicillin G and tet ...
Handle:
10113/31310
DOI:
10.1139/m73-221
PubMed:
4768832

32. Agricultural Chemicals in Surface Runoff, Ground Water, and Soil: I. Endrin

Author:
G. H. Willis; R. A. Hamilton
Source:
Journal of environmental quality 1973 v.2 no.4 pp. 463-466
ISSN:
0047-2425
Subject:
Saccharum officinarum; agrochemicals; application rate; endrin; groundwater; rain; runoff; soil; sugarcane
Abstract:
... Endrin (1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4, 4a,5,6,7,8,8aoctahydro-1,4-endo, endo-5,8-dimethanonapthalene) was surface applied at a rate of 0.337 kg/ha to sugarcane (Saccharum officinarum L.) plots instrumented to sample surface runoff and ground water. Runoff, ground water, and soil sampleswere collected over a 2-year period and analyzed for endrin. Only small amounts of endrin were lost annu ...
DOI:
10.2134/jeq1973.00472425000200040012x

33. Agricultural Trade Intensity: The European Markets and the U. S.

Author:
M. K. Carney
Source:
American journal of agricultural economics 1973 v.55 no.4_Part_1 pp. 637-640
ISSN:
0002-9092
Subject:
European Union; agricultural economics; agricultural trade; markets
Abstract:
... To examine developments in agricultural trade between countries in EEC and EFTA, the U. S., and an aggregate of other countries, a measure of trading intensity is calculated for years from 1960 through 1969. Intra‐EFTA trade intensified; EEC trade did not. U. S. trade with the remainder of the world intensified. ...
DOI:
10.2307/1238351

34. Agriculture's Place in the Environment: Considerations for Decision Making

Author:
Willard H. Garman
Source:
Journal of environmental quality 1973 v.2 no.3 pp. 327-333
ISSN:
0047-2425
Subject:
air; algae; aquatic plants; bacteria; carbon dioxide; coal; decision making; effluents; energy; eutrophication; farms; fertilizers; industrial wastes; nitrates; nutrients; oils; organic matter; oxygen; photosynthesis; runoff; sewage; shorelines; soil; surface water; symbiosis; wildlife; Africa; Brazil; Canada; Siberia; United States
Abstract:
... Chemical elements at or near the earth's surface and in the air are in a continuing state of movement or subject to forces which can cause movement. The outstanding characteristic is that outgo of inorganic elements (including plant nutrients) from land to water greatly exceeds input over most land surfaces of the earth. Nutrients have been accumulating under water along the shorelines of the worl ...
DOI:
10.2134/jeq1973.00472425000200030002x

35. Agronomic Characteristics of Near-Isogenic Tall and Semidwarf Lines of Durum Wheat

Author:
L. R. Joppa
Source:
Crop science 1973 v.13 no.6 pp. 743-746
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Semidwarf genes from ‘Norin-10’ and other semidwarf varieties have been used widely in breeding high-yielding hexaploid wheats (Triticum sp.). These genes also have been transferred to tetraploid durum wheat (Triticum turgidum L.). The effect of the semidwarf genes on eight agronomic characteristics of durum wheat were investigated at two locations in each of 2 years, using paired tall and semidwa ...
DOI:
10.2135/cropsci1973.0011183X001300060046x

36. Agronomic Investigations Using Continuous Function Experimental Designs—Nitrogen Fertilization of Sweet Corn

Author:
R. L. Fox
Source:
Agronomy journal 1973 v.65 no.3 pp. 454-456
ISSN:
0002-1962
Subject:
Zea mays; corn; experimental design; fertilizer application; leaves; nitrogen fertilizers; sweetcorn
Abstract:
... Simple experimental designs are needed for exploratory field studies and for generating data for well defined yield response curves and surfaces. A design was developed by which a variable was increased in many small increments along corn (Zea mays L.) rows. Individual plants were handled as plots. Sweet corn was grown in rows 12 m long, along which rates of N fertilization increased in 40 increme ...
DOI:
10.2134/agronj1973.00021962006500030029x

37. Agronomic Potential of Nectariless Cotton

Author:
William R. Meredith; C. D. Ranney; M. L. Laster; R. R. Bridge
Source:
Journal of environmental quality 1973 v.2 no.1 pp. 141-144
ISSN:
0047-2425
Subject:
Coccinellidae; Gossypium hirsutum; Lygus lineolaris; agronomic traits; cotton; fiber quality; genetic variation; leaves; nectaries; predatory insects; river deltas; yield components
Abstract:
... We compared three BC₆F₄ nectariless strains of cotton (Gossypium hirsutum L.) with their recurrent parent varieties for yield, yield components, and fiber properties at six environments in 1971. A slight decrease (4.3%) in yield for nectariless ‘Stoneville 7A’ and a slight increase (3.8%) in yield for nectariless ‘Deltapine Smooth Leaf’ was detected. Nectaried and nectariless ‘Dixie King’ did not ...
DOI:
10.2134/jeq1973.00472425000200010026x

38. Air Entrapment as a Possible Source of Error in the Use of a Cylindrical Heat Probe

Author:
N. K. Nagpal; L. Boersma
Source:
Soil Science Society of America journal 1973 v.37 no.6 pp. 828-832
ISSN:
0361-5995
Subject:
air; ambient temperature; glass; heat; particle size; porous media; sieving; soil water; soil water content; thermal conductivity; water content
Abstract:
... The cylindrical heat probe is frequently used to measure the thermal conductivity of soils. Its theory is based on the assumption of zero thermal contact resistance at the probe surface. Noncompliance with this assumption could result from air entrapment at the probe surface, at the time of inserting the probe into the porous material. Results of studies are reported which show that the use of the ...
DOI:
10.2136/sssaj1973.03615995003700060014x

39. Air Temperature, Heat Sums, and Pollen Shedding Phenology of Longleaf Pine

Author:
William D. Boyer
Source:
Ecology 1973 v.54 no.2 pp. 420-426
ISSN:
0012-9658
Subject:
Pinus palustris; air temperature; heat sums; phenology; pollen; trees; Alabama; North Carolina
Abstract:
... Between 1957 and 1966, pollen shedding by longleaf pine (Pinus palustris Mill.) in southwestern Alabama peaked at dates ranging from February 23 to April 3. January 1 and 50 degrees F was the combination of starting date and threshold air temperature that minimized annual variations in heat sums before the trees flowered. The heat sum required for peak pollen shedding declined as the season advanc ...
DOI:
10.2307/1934351

40. Air pollution from duststorms in the Great Plains

Author:
Hagen, L.J.; Woodruff, N.P.
Source:
Atmospheric environment 1973 v.7 no.3 pp. 323-332
ISSN:
0004-6981
Subject:
temporal variation; meteorological data; relative humidity; equations; frequency; pollutants; particulates; wind speed; air pollution; particle size distribution; dust storms; Great Plains region
Abstract:
... Great Plains states are adopting air pollution regulations to limit particulate concentrations. Because little information is available about duststorms, an important source of particulates in those states, hourly observations of the weather on dusty days during the 1950's at 37 weather stations were analyzed. Wind direction was southerly, and windspeeds were usually 8.9-13.4 m s-1 (20-30 miles h- ...
Handle:
10113/12981

41. Akakabi (Fusarium) toxins. 1

Author:
Ueno, Y.
Source:
Shokuhin Eiseigaku Zasshi 1973 v.14 no.5 pp. 403-414
ISSN:
0015-6426
Subject:
foods; Fusarium; feeds
DOI:
10.3358/shokueishi.14.403

42. Alfalfa Pollen Production in Relation to Percentage of Hybrid Seed Produced

Author:
M. W. Pedersen; D. K. Barnes
Source:
Crop science 1973 v.13 no.6 pp. 652-656
ISSN:
0011-183X
Subject:
Medicago sativa; alfalfa; dehiscence; equations; flower color; flowers; genetic markers; greenhouses; hybrids; male sterility; males; pollen; pollen productivity; pollination; prediction; seed yield
Abstract:
... The relationship between different levels of pollen production and percentage crossing in alfalfa (Medicago sativa L.) was studied in both hand-crosses in the greenhouse and bee-pollinatlons in the field. White flower color was used as a genetic marker to determine the amount of crossing. Pollen production was rated in 4 classes: 1 = no pollen, 2= trace of pollen, 3 = moderate amount of pollen, an ...
DOI:
10.2135/cropsci1973.0011183X001300060020x

43. Alfalfa Seed Size as an Indicator of Hybridity

Author:
M. W. Pedersen; D. K. Barnes
Source:
Crop science 1973 v.13 no.1 pp. 72-75
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... The size of hybrid and selfed alfalfa (Medicago saliva L.) seed were studied with a view to utilizing size differences in breeding procedures. Pollen parents and seed parents both had a measurable effect on alfalfa seed size. On the average, selfed seeds on a given seed parent were about 10% smaller than F₁ hybrid seed. Some pollen parents produced larger hybrid seeds than other pollen parents. Ma ...
DOI:
10.2135/cropsci1973.0011183X001300010022x

44. Alkaloids and Palatability of Phalaris arundinacea L. Grown in Diverse Environments

Author:
G. C. Marten; R. F. Barnes; A. B. Simons; F. J. Wooding
Source:
Agronomy journal 1973 v.65 no.2 pp. 199-201
ISSN:
0002-1962
Subject:
Phalaris arundinacea; clones; gramine; heat; palatability; photoperiod; screening; sheep; Alaska; Indiana; Minnesota; Pennsylvania
Abstract:
... We grew 15 clones of reed canarygrass (Phalaris arundinacea L.) of varying palatability in Indiana and Minnesota and nine clones in Pennsylvania and Alaska over a 2-year period to determine whether diverse environments would influence alkaloid type, alkaloid concentration, and palatability. We also determined the repeatability of a previously-established correlation between palatability and total ...
DOI:
10.2134/agronj1973.00021962006500020004x

45. Allocation of Scarce Resources to Agricultural Research: Review of Methodology

Author:
C. Richard Shumway
Source:
American journal of agricultural economics 1973 v.55 no.4_Part_1 pp. 557-566
ISSN:
0002-9092
Subject:
agricultural economics; agricultural research; models; quantitative analysis; research management; resource allocation
Abstract:
... With an increasing stress on research budgets, the impetus for investigation of alternative models for managing research is growing. Much work has been invested already in technique development. To precede additional research, the current state‐of‐the‐art in resource allocation methodology pertinent to agricultural research management is presented. The focus is on quantitative approaches for impro ...
DOI:
10.2307/1238340

46. Alopecia in rats housed in groups

Author:
Joyce L. Beare-Rogers; J. E. McGowan
Source:
Laboratory animals 1973 v.7 no.3 pp. 237-238
ISSN:
1758-1117
Subject:
alopecia; cages; experimental diets; laboratory animals; males; rats
Abstract:
... Young male rats fed experimental diets containing 20% by weight of fat developed alopecia when housed in groups, but not in individual cages. ...
DOI:
10.1258/002367773780944058

47. Alternative Tax Treatment of Orchard Development Costs: Impacts on Producers, Middlemen, and Consumers

Author:
Hoy F. Carman; James G. Youde
Source:
American journal of agricultural economics 1973 v.55 no.2 pp. 184-191
ISSN:
0002-9092
Subject:
agricultural economics; crops; income tax; orchards; California
Abstract:
... Present federal income tax laws allow current deduction of development costs for most orchard crops. An economic surplus framework is used to analyze the impact of cost capitalization on producers, middlemen, and consumers. Estimated net social returns per dollar of tax subsidy range from $0.12 to $15.00 for five California orchard crops under present tax treatment. ...
DOI:
10.2307/1238435

48. Amino Acid Distribution in Forest Humus Layers in British Columbia

Author:
L. E. Lowe
Source:
Soil Science Society of America journal 1973 v.37 no.4 pp. 569-572
ISSN:
0361-5995
Subject:
Sphagnum; autoclaves; forests; glutamic acid; glycine (amino acid); hexosamines; humus; hydrolysates; hydrolysis; leucine; mineral soils; organic horizons; proline; British Columbia
Abstract:
... Amino acid distribution was studied in hydrolysates from L, F, and H horizons at seven sites under different vegetation. Hydrolysis in an autoclave for 6 hours was found comparable to a 24-hour hydrolysis under reflux, but was more rapid and convenient and gave better precision in estimates of individual amino acid levels. Amino acid distribution was generally similar to that reported for mineral ...
DOI:
10.2136/sssaj1973.03615995003700040029x

49. Ammmonium and Nitrate Uptake by Corn (Zea mays L.) as Influenced by Nitrogen Concentration and NH+4 /NO-3 Ratio

Author:
D. D. Warncke; S. A. Barber
Source:
Agronomy journal 1973 v.65 no.6 pp. 950-953
ISSN:
0002-1962
Subject:
Zea mays; ammonium nitrate
Abstract:
... Corn (Zea mays L.) absorbs both ammonium and nitrate forms of N. Both are usually present in the soil and some control of their proportions can be obtained by controlling nitrification. Little is known about the relative rates of absorption of these ions or their effect on plant growth rate when both are present. We investigated the effects of NH₄⁺ and NO₃⁻ on corn by growing 13-day-old corn seedl ...
DOI:
10.2134/agronj1973.00021962006500060031x

50. Ammonia Nitrogen Losses from Simulated Plowing of Native Sods

Author:
M. L. Hooker; G. A. Peterson; D. H. Sander
Source:
Soil Science Society of America journal 1973 v.37 no.2 pp. 247-249
ISSN:
0361-5995
Subject:
ammonia; ammonium nitrogen; field capacity; plowing; volatilization; water content; wilting point
Abstract:
... The objective of this research was to measure NH₃ gas evolved from soils that have recently been broken from the native sod condition. Methodology for measuring NH₃ losses under simulated natural environments is presented. Two moisture levels, field capacity, and wilting point were studied. It was concluded that NH₃ volatilization was not a significant loss mechanism in the first 160 days after cu ...
DOI:
10.2136/sssaj1973.03615995003700020026x

51. Ammonia Volatilization from Surface Applications of Ammonium Compounds on Calcareous Soils: I. General Theory

Author:
L. B. Fenn; D. E. Kissel
Source:
Soil Science Society of America journal 1973 v.37 no.6 pp. 855-859
ISSN:
0361-5995
Subject:
ammonia; ammonium carbonate; ammonium chloride; ammonium hydroxide; ammonium nitrate; ammonium nitrogen; ammonium salts; ammonium sulfate; application rate; barium; calcareous soils; calcium; calcium sulfate; carbon dioxide; fluorides; magnesium; soil pH; solubility; volatilization
Abstract:
... Volatilization of NH₃ from NH₄⁻-N salts applied to the surface of a calcareous soil was investigated. Ammonia losses from surface applied NH₄F, (NH₄)₂SO₄, and (NH₄)₂HPO₄ were 68, 54, and 51%, respectively, of the added NH₄⁻-N in 100 hours. Ammonium nitrate, NH₄Cl, and NH₄I lost 18, 18, and 16%, respectively, of the added NH₄-N in 100 hours. An increase in pH at the soil surface resulted in higher ...
DOI:
10.2136/sssaj1973.03615995003700060020x

52. Ammonia kills spoilage molds in corn

Author:
Bothast, R.J.; Lancaster, E.B.; Lesseltine, C.W.
Source:
Journal of dairy science 1973 v.56 no.2 pp. 241-245
ISSN:
0022-0302
Subject:
water content; corn; seeds; microbial contamination; molds (fungi); ammonia; chemical treatment; chemical concentration; antifungal properties; fungicides; tempering; mice; feeding preferences; stored product protection
Abstract:
... Maize with 26 or 12% moisture was treated with ammonia at 2 or 0.5% of dry weight, respectively. Ammoniation at both concentrations eliminated external and infecting moulds and yeasts and tended to reduce bacterial counts. Moulds killed were species of Aspergillus, Penicillium, Fusarium, Trichoderma and Rhizopus. In feeding trials mice showed no preference between tempered and 2% ammoniated maize ...
Handle:
10113/31280

53. Ammonification and Nitrification of N as Influenced by Soil pH and Previous N Treatments

Author:
W. S. Dancer; L. A. Peterson; G. Chesters
Source:
Soil Science Society of America journal 1973 v.37 no.1 pp. 67-69
ISSN:
0361-5995
Subject:
ammonification; nitrates; nitrification; soil pH; soil sampling
Abstract:
... The effect of soil pH on rates of ammonification and nitrification was studied. Soil samples which ranged in pH from 4.7 to 6.6 from an established lime and N fertility experiment were used. Soil pH values in the lime plots have been relatively constant for several years. Soil pH did not affect rates of ammonification appreciably; however it had a significant effect on nitrification rates. Length ...
DOI:
10.2136/sssaj1973.03615995003700010024x

54. Amorphous Coatings on Mineral Surfaces

Author:
R. C. Jones; G. Uehara
Source:
Soil Science Society of America journal 1973 v.37 no.5 pp. 792-798
ISSN:
0361-5995
Subject:
aluminum; aluminum silicates; cement; coatings; electron microscopes; gels; quartz; soil
Abstract:
... Amorphous coatings on mineral surfaces too thin to be resolved by most electron microscopes were detected bridging particles suspended over holes in the supporting substrates. The coatings are gel-like in appearance, may flow when wet, shrink and become porous when heated, cement primary particles into large masses, and exhibit a coat-of-paint effect with curved solid-air interfaces. Amorphous gel ...
DOI:
10.2136/sssaj1973.03615995003700050044x

55. Amphipod Amplexus, The Significance of Ecotypic Variation

Author:
Donald R. Strong Jr.
Source:
Ecology 1973 v.54 no.6 pp. 1383-1388
ISSN:
0012-9658
Subject:
Hyalella azteca; correlation; females; fish; molting; predation
Abstract:
... The proportion of the female molt cycle spent in amplexus varies inheritably among several populations of the talitrid amphipod Hyalella azteca. Duration of amplexus is negatively correlated with an index of the intensity of predation by visually orienting fish. As amplexus renders the amphipods more vulnerable to these fish, I hypothesize that this type of predation selects for an abbreviation se ...
DOI:
10.2307/1934203

56. Analysis of Insect Consumption in a Forest Conopy

Author:
D. E. Reichle; R. A. Goldstein; R. I. Van Hook Jr.; G. J. Dodson
Source:
Ecology 1973 v.54 no.5 pp. 1076-1084
ISSN:
0012-9658
Subject:
Liriodendron tulipifera; age structure; biogeochemical cycles; biomass; canopy; equations; forests; grazing; leaf area; leaf emergence; leaves; mathematical models; phytophagous insects; primary productivity; surface area
Abstract:
... A mathematical model has been developed for estimating the consumption of canopy vegetation by insects. The model divides canopy leaves into age classes according to time of leaf emergence. Periodic measurements were made of gross leaf area and ₕole area initiated by insect consumption for each generation. Gross area distributions were used to determine empirical growth functions for the canopy ve ...
DOI:
10.2307/1935573

57. Analysis of Interrelationships among Seedling Vigor, Field Emergence, and Yield in Wheat

Author:
P. R. Das Gupta; H. M. Austenson
Source:
Agronomy journal 1973 v.65 no.3 pp. 417-422
ISSN:
0002-1962
Subject:
Triticum aestivum; farmers; field experimentation; grain yield; imbibition; seed germination; seed quality; seed treatment; seedling growth; seedlings; seeds; spring wheat; vigor; Saskatchewan
Abstract:
... To evaluate various seed quality criteria, 86 samples of spring wheat (Triticum aestivum L. ‘Manitou’), obtained from farmers in 1969, were grown in the same year with and without Panogen 15 seed treatment in replicated field trials at three locations in Saskatchewan. Untreated seed samples were grown again in 1970 at one of the locations. Determinations were made in the laboratory of various seed ...
DOI:
10.2134/agronj1973.00021962006500030019x

58. Analysis of Irradiation Induced Virescent Mutants and the Identification of a New Virescent Mutant (v5v5,v6v6) in Gossypium hirsutum L.

Author:
R. J. Kohel
Source:
Crop science 1973 v.13 no.1 pp. 86-88
ISSN:
0011-183X
Subject:
Gossypium hirsutum; cotton; genes; irradiation; loci; mutants
Abstract:
... Seven irradiation induced virescent cotton (Gossypium hirsutum L.) mutants were analyzed. Four were duplicates of virescent-1 and two were duplicates of yellowgreen. One virescent was independent of all known virescents. The new virescent was conditioned by recessive duplicate factors, and it was assigned the gene symbols v₅v₅,v₆v₆. Linkage analysis showed that the v₅ locus resides in the A subgen ...
DOI:
10.2135/cropsci1973.0011183X001300010027x

59. Analysis of Multidimensional Leaching

Author:
A. J. Peck
Source:
Soil Science Society of America journal 1973 v.37 no.2 pp. 320
ISSN:
0361-5995
Subject:
leachates; leaching; soil; solutes
Abstract:
... A simplified analysis is reported of solute leaching from the soil surface to tile drains while infiltration is steady and uniform. Leachate concentration is predicted to decay exponentially with characteristics determined by physical parameters of the system. Predicted decay characteristics are in good agreement with Mulqueen and Kirkham's experimental data. ...
DOI:
10.2136/sssaj1973.03615995003700020042x

60. Analysis of Several Types of Gene Action Controlling Resistance to Bacterial Blight of Cotton by Means of a Generalized Computer Model

Author:
D. D. Davis; J. Jackson; H. Z. Cross
Source:
Crop science 1973 v.13 no.3 pp. 338-343
ISSN:
0011-183X
Subject:
Gossypium hirsutum; Xanthomonas campestris pv. malvacearum; blight; computer simulation; computer software; cotton; genes; humidity; models; pathogens; phenotype; progeny; temperature
Abstract:
... A computer program has been written having the capability to fit three- or four-gene models to F₂ segregation data divided into ten or fewer phenotypic classes. The various types of gene action analyzed are known to occur in the determination of bacterial blight resistance in cotton. The genes in any specific model may be independent or dependent, unequal in effect, and either dominant, partially ...
DOI:
10.2135/cropsci1973.0011183X001300030016x

61. Analysis of Transport Phenomena Associated with Convective Drying of a Textile Material

Author:
S.L. Cannon; R.F. Johnson; G.F. Meenaghan
Source:
Textile research journal 1973 v.43 no.7 pp. 423-427
ISSN:
0040-5175
Subject:
convection; cotton; differential equation; drying; energy conservation; fabrics; industry; interphase; mass transfer; models; momentum; polyesters; textile fibers
Abstract:
... The advent of forced convective heat-transfer units within the textile chemical-process industry has stimulated inquiry into interphase, multicomponent transport-phenomena associated with the coupled mechanisms of heat and mass transfer. The generalized partial differential equations for mass, momentum, and energy conservation are employed subject to the constraints of a film-theory transport mode ...
DOI:
10.1177/004051757304300710

62. Analysis of the Performance of an Improved Soil Heat Flux Transducer

Author:
M. Fuchs; A. Hadas
Source:
Soil Science Society of America journal 1973 v.37 no.2 pp. 173-175
ISSN:
0361-5995
Subject:
air; aluminum; glass; heat flow; heat transfer; soil heat flux; soil separates; soil water content; texture; thermal conductivity
Abstract:
... Soil heat flux plates, made of a thermopile wound on a glass microscope slide, sandwiched between two anodized aluminum sheets were calibrated in a box designed to provide one-dimensional heat flow of known flux density. The medium in the box consisted of various air dry soil separates of different texture and thermal conductivity. Calibrations were repeated under field conditions with two levels ...
DOI:
10.2136/sssaj1973.03615995003700020009x

63. An Analytical Consideration of Undersoil Heating

Author:
George J. Trezek; Dennis Obeng
Source:
Journal of environmental quality 1973 v.2 no.4 pp. 458-462
ISSN:
0047-2425
Subject:
electric power; heat transfer; heat transfer coefficient; pipes; power plants; soil temperature; temperature profiles
Abstract:
... The feasibility of using reject heat from electrical power plants for undersoil heating has been analytically considered. Since soil is a poor thermal conductor, a suitable arrangement of undersoil pipes is required in order to achieve a somewhat uniformly elevated soil temperature. Two-dimensional steady temperature profiles in soil resulting from a warm water pipe having a wall temperature of 37 ...
DOI:
10.2134/jeq1973.00472425000200040011x

64. Analytical Solution of the Convective-Dispersive Equation for Cation Adsorption in Soils

Author:
Robert W. Cleary; Donald Dean Adrian
Source:
Soil Science Society of America journal 1973 v.37 no.2 pp. 197-199
ISSN:
0361-5995
Subject:
adsorption; cations; equations; soil
Abstract:
... The analytical solution of a cation adsorption soil problem is derived in detail by an integral transform method. The solution applies to the case of unsteady-state, one-dimensional flow through soils where a linear equilibrium exists between the cation in the flowing solution and the cation adsorbed on the exchanger phase. The effects of axial dispersion are also included in the solution. ...
DOI:
10.2136/sssaj1973.03615995003700020014x

65. Anion Exclusion and Coupling Effects in Nonsteady Transport Through Unsaturated Soils: I. Theory

Author:
Eshel Bresler
Source:
Soil Science Society of America journal 1973 v.37 no.5 pp. 663-669
ISSN:
0361-5995
Subject:
adsorption; anions; clay; convection; equations; hydrodynamics; simulation models; soil water; soil water content; solutes
Abstract:
... A simulation model for the simultaneous transport of anions and water is developed, taking into account physico-chemical interaction between the solutes and the soil matrix. The effects of convection, ionic diffusion, mechanical dispersion, anion exclusion (negative adsorption), and coupling phenomena are considered jointly. The dependence of the osmotic efficiency coefficient and anion exclusion ...
DOI:
10.2136/sssaj1973.03615995003700050013x

66. The Annual Cycle of Aggression in Male Microtus Pennsylvanicus, and Its Relation to Population Parameters

Author:
Brian N. Turner; Stuart L. Iverson
Source:
Ecology 1973 v.54 no.5 pp. 967-981
ISSN:
0012-9658
Subject:
Microtus pennsylvanicus; Peromyscus; adults; aggression; breeding; breeding season; correlation; home range; juveniles; males; population density; principal component analysis; seasonal variation; spring; testes; vocalization; voles; Manitoba
Abstract:
... Intraspecific aggression of male Microtus pennsylvanicus drummondii was observed in 320 10—minute paired encounters in a neutral arena, during 17 months. Voles were drawn from a population live—trapped biweekly at Pinawa, Manitoba. The 17 months were divided into the following reproductive periods: non—breeding, testes scrotal, and littering. There were two non—breeding, two testes scrotal periods ...
DOI:
10.2307/1935564

67. Another hystricomorph rodent: keeping casiragua (Proechimys guairae) in captivity

Author:
Barbara J. Weir
Source:
Laboratory animals 1973 v.7 no.2 pp. 125-134
ISSN:
1758-1117
Subject:
Proechimys; animal feeding; animal handling; cages; captive animals; laboratory animals; reproduction; rodents
Abstract:
... Caging, feeding and handling are described. The animals were obtained for study of their reproduction and details of this are given. ...
DOI:
10.1258/002367773781008687

68. Antagonism of some soil microflora species against pathogenic Fusarium graminearum Schwabe and Rhizoctonia solani Kuhn agents

Author:
N. FLOREA
Source:
Notulae botanicae Horti Agrobotanici Cluj-Napoca 1973 v.7 no.1 pp. 73-74
ISSN:
1842-4309
Subject:
Aspergillus; Fusarium graminearum; Penicillium; Thanatephorus cucumeris; Trichoderma viride; Trichothecium roseum; antagonism; antagonists; soil; soil microorganisms
Abstract:
... In vitro results of some soil micoflora species antagonisms against pathogenic Fussarium graminearum Schwabe and Rhizoctonia solani Kuhn agents are presented. Following tets performed Aspergillus spp., Trichoderma viride and Penicillium spp. Were found to be antagonist against Fusarium graminearum. Antagonist against Rhizoctonia solani
DOI:
10.15835/nbha71164

69. Antimicrobial action of peracetic acid. 1. fungicidal action

Author:
Tutumi, M.; Imamura, K.; Hatano, S.; Watanabe, T.
Source:
Shokuhin Eiseigaku Zasshi 1973 v.14 no.5 pp. 443-447
ISSN:
0015-6426
Subject:
Aspergillus; Penicillium; Rhizopus; Mucor
DOI:
10.3358/shokueishi.14.443

70. Apical control of flowering in an orchid hybrid, Aranda Deborah

Author:
Goh, C.J.; Seetoh, H.C.
Source:
Annals of botany 1973 v.37 no.1 pp. 113-119
ISSN:
0305-7364
Subject:
Aranda; decapitation; flowering; gibberellic acid; hybrids; indole acetic acid; mature plants
Abstract:
... Decapitation induced flowering in an orchid hybrid, Aranda Deborah. This flowering response was observed in both mature plants and cuttings. Flowering could also be induced by stem incisions. The flowering responses of the decapitated plants were shown to be inhibited by a continuous supply of 10−4 M IAA solution. However, once the auxin supply was interrupted, floral initiation took place. Renewe ...
DOI:
10.1093/oxfordjournals.aob.a084665

71. Apparatus to measure the rate of fall of wind-dispersed seeds

Author:
Sheldon, J.C.; Lawrence, J.T.
Source:
New phytologist 1973 v.72 no.3 pp. 677-680
ISSN:
0028-646X
Subject:
Plant Science and Plant Products; botany
DOI:
10.1111/j.1469-8137.1973.tb04416.x

72. Application of Dynamic Programming in Markov Chains to the Evaluation of Water Quality in Irrigation

Author:
D. Yaron; A. Olian
Source:
American journal of agricultural economics 1973 v.55 no.3 pp. 467-471
ISSN:
0002-9092
Subject:
Markov chain; agricultural economics; dynamic programming; economic analysis; irrigation; issues and policy; models; resource management; saline water; water quality
Abstract:
... With the aid of a dynamic programming model in Markov chains, this paper presents an economic analysis of irrigation with saline water. Results provide guides to optimal irrigation policy. Estimates of the value of water quality in irrigation are derived, and possible applications in water resource development decisions are discussed. ...
DOI:
10.2307/1239127

73. Application of Genetic Male Sterility to Recurrent Selection Schemes in Soybeans

Author:
C. A. Brim; C. W. Stuber
Source:
Crop science 1973 v.13 no.5 pp. 528-530
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Recurrent selection schemes for soybeans [Glycine max (L.) Merr.] that use a genetic male-sterile factor to obtain natural crosses are outlined. A basic scheme with three generations per cycle, intermating, advancing, and testing, and modifications of the scheme are discussed. Guidelines for population size and selection intensity are considered. Expected genetic progress is presented for each sel ...
DOI:
10.2135/cropsci1973.0011183X001300050010x

74. Application of Multispectral Remote Sensing to Soil Survey Research in Southeastern Pennsylvania

Author:
H. L. Mathews; R. L. Cunningham; J. E. Cipra; T. R. West
Source:
Soil Science Society of America journal 1973 v.37 no.1 pp. 88-93
ISSN:
0361-5995
Subject:
aircraft; alluvium; colluvium; computer analysis; computers; limestone; multispectral imagery; reflectance; remote sensing; sandstone; shale; soil; soil surveys; Pennsylvania
Abstract:
... Computer analyses of multispectral imagery collected from aircraft shows promise for reducing preparation time and increasing the accuracy of soil survey maps. The study area in southeastern Pennsylvania included soils formed from limestone, shale, sandstone, alluvium, and local colluvium. Four study sites ranging in size from 8.5 to 30 ha were selected from a 72 km flightline. Surface reflectance ...
DOI:
10.2136/sssaj1973.03615995003700010029x

75. Application of Multivariate Probit to a Threshold Model of Grain Dryer Purchasing Decisions

Author:
Lowell Hill; Paul Kau
Source:
American journal of agricultural economics 1973 v.55 no.1 pp. 19-27
ISSN:
0002-9092
Subject:
agricultural economics; decision support systems; farmers; grain dryers; ownership; planning; prediction; purchasing; threshold models
Abstract:
... Purchase of grain dryers by farmers can be explained using a threshold theory of decision in which a reaction occurs only after the strength of the stimuli increases beyond the farmers' reaction threshold. Estimates of the causal relationships in this dichotomous decision model were obtained by using the probit technique with data from a farmer panel. The results provide an explanation of differen ...
DOI:
10.2307/1238657

76. Application of diazinon to greenhouse tomatoes: vegetable leaf miner control and residues in foliage and fruits

Author:
Lindquist, R.K.; Krueger, H.R.; Mason, J.F.; Spadafora, R.R.
Source:
Journal of economic entomology 1973 v.66 no.4 pp. 1001-1002
ISSN:
0022-0493
Subject:
Solanum lycopersicum var. lycopersicum; tomatoes; defoliation; Liriomyza sativae; diazinon; insect control; pesticide residues; food contamination; Ohio
DOI:
10.1093/jee/66.4.1001

77. An Approach to Farm Management Education

Author:
Michael Boehlje; Vernon Eidman; Odell Walker
Source:
American journal of agricultural economics 1973 v.55 no.2 pp. 192-197
ISSN:
0002-9092
Subject:
education programs; farm management; farms; planning; students
Abstract:
... As farm management education programs evolve to serve business‐oriented farm firms, planning, implementation, and control functions become major areas of emphasis. Integration of three computerized management tools—a budget generator, a management game, and LP‐FARM—in a farm management course provided students with practical experience in each management function. ...
DOI:
10.2307/1238436

78. An Approach to Research on Vertical Coordination: The Beef System in Oklahoma

Author:
Wayne D. Purcell
Source:
American journal of agricultural economics 1973 v.55 no.1 pp. 65-68
ISSN:
0002-9092
Subject:
agricultural economics; beef; marketing; Oklahoma
Abstract:
... Analysis of selected subsystems of the Oklahoma beef marketing system reveals conflicts and inconsistencies in basic interstage relationships. Such conflicts and inconsistencies block realization of higher degrees of interstage or interlevel coordination. Improvement will require a research orientation which isolates such barriers and estimates their impact on system participants. ...
DOI:
10.2307/1238664

79. Artificial Weathering of Oxidized Biotite: I. Potassium Removal by Sodium Chloride and Sodium Tetraphenylboron Solutions

Author:
R. J. Gilkes; R. C. Young; J. P. Quirk
Source:
Soil Science Society of America journal 1973 v.37 no.1 pp. 25-28
ISSN:
0361-5995
Subject:
absorption; biotite; cations; iron; leaching; mica; oxidation; potassium; sodium; sodium chloride; weathering
Abstract:
... The rate of release of interlayer potassium from biotite to NaCl and NaCl/sodium tetraphenylboron solutions is determined by the oxidation state of octahedral iron. Octahedral cation vacancies are generated when octahedral iron is oxidized resulting in a change of orientation of hydroxyl from perpendicular to the mica layer to parallel. This in turn produces a more stable environment for interlaye ...
DOI:
10.2136/sssaj1973.03615995003700010013x

80. Artificial Weathering of Oxidized Biotite: II. Rates of Dissolution in 0.1, 0.01, 0.001M HCl

Author:
R. J. Gilkes; R. C. Young; J. P. Quirk
Source:
Soil Science Society of America journal 1973 v.37 no.1 pp. 29-33
ISSN:
0361-5995
Subject:
biotite; cations; hydrochloric acid; iron; magnesium; manganese; oxidation; soil; surface area; weathering; zinc
Abstract:
... Rates of dissolution of biotite in 0.1, 0.01, 0.001M HCl decrease as the proportion of ferric iron in octahedrally coordinated sites increases. This is interpreted as being partly due to a decrease in the rate of K exchange from oxidized biotite so that a smaller surface area is exposed to acid attack. The availability of structural cations (Mg, Mn, Zn, K, etc.) to plants growing on biotite rich s ...
DOI:
10.2136/sssaj1973.03615995003700010014x

81. Ascocarps of Aspergillus stromatoides, Aspergillus niveus, and Aspergillus flavipes

Author:
Wiley, B.J.; Fennell, D.I.
Source:
Mycologia 1973 v.65 no.4 pp. 752-760
ISSN:
0027-5514
Subject:
soil fungi; Aspergillus flavipes; fruiting bodies; strains; in vitro culture
Handle:
10113/32130

82. Asparagine accumulation in genetically chlorotic tissue

Author:
Land, J.B.; Norton, G.
Source:
New phytologist 1973 v.72 no.3 pp. 493-496
ISSN:
0028-646X
Subject:
plant genetics; plant damage; plant breeding
DOI:
10.1111/j.1469-8137.1973.tb04399.x

83. Aspects of the Biology of Trientalis Borealis Raf

Author:
Roger C. Anderson; Orie L. Loucks
Source:
Ecology 1973 v.54 no.4 pp. 798-808
ISSN:
0012-9658
Subject:
ambient temperature; asexual reproduction; cold treatment; dry matter accumulation; germination; photoperiod; rhizomes; seedlings; seeds; tubers; North America
Abstract:
... Three species and one subspecies of Trientalis are recognized in North America, but only Trientalis borealis Raf., the northern starflower, occurs in eastern North America. The life cycle consists of three distinct phases each year: shoot development, rhizome growth, and tuber formation. Asexual reproduction by tubers is more important than reproduction by seed. Of the annual dry matter produced, ...
DOI:
10.2307/1935674

84. Aspects of the reproductive biology of three species of ectobius (dictyoptera: blattidae)

Author:
BROWN, VALERIE K.
Source:
Entomologia experimentalis et applicata 1973 v. no. pp. 213-222
ISSN:
0013-8703
Subject:
Blattidae; Ectobius pallidus; fecundity; females; longevity; parthenogenesis
Abstract:
... Ootheca production is here investigated in three species of field-dwelling cockroaches under both field and controlled conditions. Mating is shown to have a significant effect on the length of the pre-oviposition and inter-oviposition periods, fecundity, female longevity and the formation of the ootheca. The occurrence of facultative parthenogenesis is confirmed in Ectobius lapponicus and E. palli ...
DOI:
10.1111/j.1570-7458.1973.tb00267.x

85. Assessment and Analysis of the Bellows Ventilation of Clothing

Author:
Z. Vokac; V. Køpke; P. Keül
Source:
Textile research journal 1973 v.43 no.8 pp. 474-482
ISSN:
0040-5175
Subject:
air; clothing; evaporation; fabrics; heat flow; microclimate; relative humidity; sorption; sweat; temperature; textile fibers; walking; water vapor
Abstract:
... A methodical approach is described, attempting to separate the loss of heat and moisture due to forced exchange of air inside clothing, when walking, from the loss caused by gradients between the body and the environment. Temperature, heat flow, and relative humidity were recorded on the skin of the back and inside the respective clothing (shirt only, vest and shirt, or vest, shirt and anorak) in ...
DOI:
10.1177/004051757304300806

86. Assessment of the output of a stochastic decision model

Author:
J. Brian Hardaker; A.G. Tanago
Source:
Australian journal of agricultural and resource economics 1973 v.17 no.3 pp. 170-178
ISSN:
1364-985X
Subject:
alfalfa; alfalfa hay; crop production; decision making; simulation models; stochastic processes; Spain
Abstract:
... The concept of stochastic dominance is described and its use is illustrated in relation to the evaluation of the output of a systems simulation model of lucerne haymaking in south‐west Spain. Two alternative machinery systems are ranked for various lucerne areas using the criteria of stochastic dominance, and These results are compared with those obtained using mean‐variance analysis. ...
DOI:
10.1111/j.1467-8489.1973.tb00119.x

87. Assessments of the relative values of compound nitrogen‐phosphorus fertilizers for wheat production

Author:
J.D. Colwell
Source:
Australian journal of agricultural and resource economics 1973 v.17 no.3 pp. 189-199
ISSN:
1364-985X
Subject:
compound fertilizers; crop production; fertilizer rates; nitrogen; nitrogen fertilizers; nutrients; phosphorus; New South Wales
Abstract:
... A general procedure is developed for calculating optimal rates of application of compound fertilizers, containing several nutrients in fixed composition. The calculations are based on response surface models that have been obtained with single nutrient fertilizers. The relative values of alternative compounds can be assessed from the increases in profit that result from their use at optimal rates ...
DOI:
10.1111/j.1467-8489.1973.tb00121.x

88. Das Auftreten physiologischer Rassen von Phytophthora infestans (Mont.) de By. im Jahre 1970 auf dem Gebiet der DDR

Author:
Hahn, E.; Henniger, H.; Oertel, H.
Source:
Archiv für Pflanzenschutz 1973 v.9 no.2 pp. 105-112
ISSN:
0003-9349
Subject:
potatoes; German Federal Republic
DOI:
10.1080/03235407309431213

89. Automated Repetitive Short-Term Extraction of Soil Samples

Author:
Jean-Claude Ballaux; D. E. Peaslee
Source:
Soil Science Society of America journal 1973 v.37 no.3 pp. 478-480
ISSN:
0361-5995
Subject:
automation; ions; pesticides; soil; soil sampling
Abstract:
... Studies of P release during short contact times between soil and extractant were conducted on soils with an automatic sequential extracting apparatus. Varying contact times between the soil and extracting solution can be set by an adjustable multigang timer of 20-min cycle. Data for two soils of different textures show marked differences in P extraction. The apparatus appears adaptable for evaluat ...
DOI:
10.2136/sssaj1973.03615995003700030044x

90. Automated Total Nitrogen Analysis of Soil and Plant Samples

Author:
G. E. Schuman; M. A. Stanley; D. Knudsen
Source:
Soil Science Society of America journal 1973 v.37 no.3 pp. 480-481
ISSN:
0361-5995
Subject:
automation; environmental quality; rapid methods; soil; total nitrogen
Abstract:
... Soils research dealing with environmental quality requires the analysis of large numbers of samples to better characterize the problem. An automated technique, using a Tecator digester and Technicon AutoAnalyzer, has proved to be as reliable as the standard micro-Kjeldahl procedure and permits more rapid analysis of the digests (30 per hour). The system is compact and involves fewer steps for anal ...
DOI:
10.2136/sssaj1973.03615995003700030045x

91. Bacteria, spirochetes, and rickettsia as insecticides

Author:
St. Julian, G.; Bulla, L.A.; Sharpe, E.S.; Adams, G.L.
ISSN:
0077-8923
Subject:
entomopathogenic bacteria; insect diseases; infection; biological control agents; bacterial insecticides; insect control; Rickettsiales; Spirochaetaceae
Handle:
10113/31551
DOI:
10.1111/j.1749-6632.1973.tb32749.x

92. Bagworms: effectiveness of several insecticide formulations against the larvae of three species

Author:
Nakayama, I.; Kuroda, T.; Kitagaki, T.; Shinohara, H.; Otokozawa, T.
Source:
Journal of economic entomology 1973 v.66 no.4 pp. 941-943
ISSN:
0022-0493
Subject:
Chamaecyparis pisifera; Lepidoptera; Viburnum odoratissimum; insecticides; pest control; Prunus mume
DOI:
10.1093/jee/66.4.941

93. Ballistic Impact of Textile Structures

Author:
David Roylance; Anthony Wilde; Gregory Tocci
Source:
Textile research journal 1973 v.43 no.1 pp. 34-41
ISSN:
0040-5175
Subject:
energy; fabrics; models; nylon; textile fibers
Abstract:
... Previous work on transverse impact of single textile fibers is reviewed and extended to model orthogonal weaves in which fiber crossovers are simplified as pin. joints. A dynamic finite-element computer technique previously developed for single fibers is extended to model the woven panel, and this method is shown to produce results which are in sub stantial agreement with experimental observations ...
DOI:
10.1177/004051757304300105

94. Barley leaf tip damage resulting from exposure to high electrical fields

Author:
Bachman, C.H.; Reichmanis, M.
Source:
International journal of biometeorology 1973 v.17 no.3 pp. 243-251
ISSN:
0020-7128
Subject:
plant damage
DOI:
10.1007/BF01804617

95. A Batch-Handling Technique for Hot-Water Extraction of Boron from Soils

Author:
Matt K. John
Source:
Soil Science Society of America journal 1973 v.37 no.2 pp. 332-333
ISSN:
0361-5995
Subject:
boron; organic matter; soil; solvents; texture
Abstract:
... A procedure was developed for the extrraction of boron by hot-water. The method was suitable for a large number of samples and a high degree of accuracy was obtained. The proposed procedure was compared with the reflux and Gupta's modified methods by using three soils of varying texture and organic matter. The reproducibility of the proposed method was found to be superior to that of the others. T ...
DOI:
10.2136/sssaj1973.03615995003700020049x

96. Below-Break Tensile Behavior of Irradiated Nylon:Part I : Ultraviolet-Irradiated Nylon 1

Author:
Margaret I. Morton
Source:
Textile research journal 1973 v.43 no.7 pp. 385-393
ISSN:
0040-5175
Subject:
air; exposure duration; fabrics; irradiation; nylon; tensile strength; textile fibers
Abstract:
... The below-break tensile properties (tensile modulus, stress decay, and elastic recovery behavior) of carbon-are-irradiated nylon 66 and nylon 6 fibers were examined after extensions of 2 and 5% held for 0-15 min under both air-dry and wet conditions. In general, the moduli of fibers extended in air were increased in proportion to the exposure time. A non- ultraviolet-stabilized nylon 66 specimen, ...
DOI:
10.1177/004051757304300704

97. Below-Break Tensile Behavior of Irradiated Nylon:Part II : Gamma-Irradiated Nylon

Author:
Margaret I. Morton
Source:
Textile research journal 1973 v.43 no.8 pp. 433-437
ISSN:
0040-5175
Subject:
air; crosslinking; fabrics; gamma radiation; irradiation; nylon; tensile strength; textile fibers
Abstract:
... The air-dry and wet below-break tensile properties (tensile modulus, stress decay, and residual extension) of nylon 66 and nylon 6 were assessed at extensions of 2 and 5% after gamma radiation dosages ranging from 0 to 15 Mrad. Modulus increases were found for fibers extended in air subsequent to the irradiation; whereas in water, little change was evident. Slight improvements in stress decay and ...
DOI:
10.1177/004051757304300801

98. Besnoitia bennetti in Two Mexican Burros

Author:
T. G. Terrell; J. L. Stookey
Source:
Veterinary pathology v.10 no.2 pp. 177-184
ISSN:
1544-2217
Subject:
Besnoitia; animal pathology; asses; females; foals; herds; males; perineum; testes; Maryland
Abstract:
... Besnoitia bennetti infection was detected in two Mexican burros from a closed herd of 15 animals in Maryland. Cystic stages, which were about 1.0 mm in diameter, were found in the testicle of a male and in the skin of the perineum and teat of a female. The superficial location of the cysts on the teat suggests the potential for traumatic rupture and oral transmission during nursing by a foal. The ...
DOI:
10.1177/030098587301000210

99. Binding of papain to dialdehyde starch

Author:
Weakley, F.B.; Mehtretter, C.L.
Source:
Biotechnology and bioengineering 1973 v.15 no.6 pp. 1189-1192
ISSN:
0006-3592
Subject:
starch; starch products; chemical reactions; aldehydes; protein binding; binding capacity; papain; enzyme activity
Handle:
10113/30921
DOI:
10.1002/bit.260150615

100. Biogeography of the Puerto Rican Bank: Introduction of Species onto Palominitos Island

Author:
Richard Levins; Harold Heatwole
Source:
Ecology 1973 v.54 no.5 pp. 1056-1064
ISSN:
0012-9658
Subject:
Drosophila; ant colonies; biogeography; extinction; frogs; introduced species; lizards; longevity; microhabitats; predation; rain forests; snails
Abstract:
... Frogs, snails, and a rainforest Drosophila introduced to a small sandy cay became locally extinct almost immediately, probably because microhabitats suitable for avoiding the extremes of physical environnemt were lacking. Two introduced species of lizards and one ant species, all three of which have been known from habitats similar to that of Palominitos, survived for from several weeks to about 1 ...
DOI:
10.2307/1935571