bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Tillage and Chemical Weed Control Practices on Soil Moisture Storage and Losses1
Authors: Wiese A. F. , Army T. J. 
Published: July 2010

SynopsisTotal moisture storage and moisture distribution in the top 4 feet of a Pullman silty clay loam profile were not affected by tillage and weed control practices.Three methods of fallow (disking, subsurface tillage and chemical weed control) were highly inefficient in storing precipitation. When weeds were properly controlled the efficiency of moisture storage under chemical fallow was equal to that under subsurface tillage.
Variation in Quantitative Characters of Soybeans After Seed Irradiation1
Authors: Rawlings J. O. , Hanway D. G. , Gardner C. O. 
Published: July 2010

SynopsisIrradiation of seeds of Adams and Hawkeye soybeans with X‐rays and thermal neutrons significantly increased the genetic variability for yield, plant height, maturity, and seed size. The estimates of genetic variance in the irradiation treatments averaged five times as large as those in the controls, and the predicted genetic gains from selection indicated that an advance could be made within each population for all characters except plant height.
Genotypic and Environmental Variances and Covariances in an Upland Cotton Cross of Interspecific Origin1
Authors: Al‐Jibouri H. A. , Miller P. A. , Robinson H. F. 
Published: July 2010

SynopsisSubstantial amounts of genotypic variance were observed for eight yield and fiber traits. Progeny × environment and plot error variances were relatively small. Lint yield was highly positively correlated with lint percentage, and there was a strong negative relationship between these two traits and lint strength.
Effects of Green Manure Crops on Dryland Wheat Production in the Great Plains Area of Montana1
Authors: Army T. J. , Hide J. C. 
Published: July 2010

SynopsisGreen manure crops of sweetclover, field peas, and winter rye grown during part of the fallow period had no beneficial effects on dryland wheat yields, test weight, or protein content, There was no evidence that continued use of green manures materially affected soil nitrogen or carbon content.
Genetic Shift During 30 Generations of Natural Selection in Barley1
Authors: Bal B. S. , Suneson C. A. , Ramage R. T. 
Published: July 2010

SynopsisGenetic shift, involving 19 of 21 characters studied, occurred during the evolutionary improvement of these populations. Parents contributed unequally, and persistent strong selection for seed size reduced it. Character associations increased under each of the three selection regimes.
Effects of Moisture Stress and Temperature on Germination of Six Range Grasses1
Authors: McGinnies William J. 
Published: July 2010

SynopsisIncreased moisture stress delayed germination, reduced rate and 28‐day total of germination. Highest average germination was at 20° C. Under high moisture stress all species germinated better at 20 than at 10 or 30° C. Seed size showed positive correlation with germination at a stress of 15 atmospheres.
Effect of Row Spacing and Plant Population on Performance of Corn, Grain Sorghum and Forage Sorghum1
Authors: Stickler F. C. , Laude H. H. 
Published: July 2010

SynopsisCorn performance was unsatisfactory in 20‐inch uncultivated rows. Grain and forage sorghums performed favorably in narrow rows. In grain sorghum, evaporative power of the air, soil temperature, light intensity, and evaporation from the soil surface decreased with decreasing row width.
Inheritance of Seed and Flower Colors in Flax1
Authors: Barnes D. K. , Culbertson J. O. , Lambert J. W. 
Published: July 2010

SynopsisThe yellow seed color of each of 12 flax varieties was attributed to the homozygous condition of 1 or more of 3 recessive genes. Two of these genes also appeared to be pleiotropic for flower color, and 1 of the 2 apparently produced a sublethal effect. Two additional genes also affected color.
Oat‐Pea or Oat‐Vetch Mixtures for Forage or Seed1
Authors: Robinson R. G. 
Published: July 2010

SynopsisAs forage crops, oat‐legume mixtures were superior to oats alone in both protein content and protein yield per acre. As feed‐grain crops, oat‐pea mixture was superior to oats alone or oats‐vetch in protein yield per acre. On a sandy soil, oat‐legume mixtures produced more forage and oat‐pea mixture produced more seed than did oats alone. On heavier soils, seed yields of the mixtures were less than those of oats alone.
Respiration of Forage Seed in Hermetically Sealed Cans1
Authors: Ching T. M. 
Published: July 2010

SynopsisCrimson clover seed respired less than perennial ryegrass seed stored under similar moisture and temperature conditions. Seed respiration was affected more by moisture content than by temperature. Carbon dioxide fixation was indicated in viable seed stored in hermetically sealed cans. Seed respiration decreased with increasing length of storage period.
Effect of Different Nitrogen Levels on the Yield, Total Nitrogen Content, and Nitrogen Recovery of Six Grasses Grown Under Irrigation1
Authors: Dotzenko A. D. 
Published: July 2010

SynopsisSix grass species were evaluated for forage yield, total nitrogen content, and percentage nitrogen recovery under 5 levels of nitrogen fertilizer. Increasing the nitrogen rate from 0 to 640 pounds per acre annually increased the forage production and the percent total nitrogen content but reduced the percentage nitrogen recovered. Loss in stand of some grass species occurred at the higher rates of nitrogen.
Some Effects of Liming, Fertilization, and Soil Moisture on Seedling Growth and Nodulation in Birdsfoot Trefoil1
Authors: McKee G. W. 
Published: July 2010

SynopsisThe pH limits for nodulation were 4.5 and 7.9. However, growth and survival of the seedlings, as well as subsequent nodulation, were satisfactory only in a pH range of 6.2 to 7.5. Nodulation was retarded and depressed more than top or root growth by various liming and fertilizer treatments and by inadequate soil moisture. Nodulation may be retarded or completely inhibited on soils subjected to desiccation or to alternating periods of moisture and drouth.
Effects of Interval and Height of Mowing on Growth of Merion and Common Kentucky Bluegrass (Poa pratensis L)1
Authors: Juska Felix V. , Hanson A. A. 
Published: July 2010

SynopsisCutting height influenced the quantity of roots to a greater degree than cutting frequency. Frequent mowing will not permit a decrease in mowing height without a reduction in the quantity of roots.
Relationships Between Soybean Yield and Concentrations of Phosphorus and Potassium in Plant Parts1
Authors: Miller R. J. , Pesek J. T. , Hanway J. J. 
Published: July 2010

SynopsisA multiple regression analysis showed that over 80% of the variation in soybean yield was accounted for by the variation in the P and K contents of some plant parts. These results were obtained in an experiment on a fine sandy loam in which applications of P and K fertilizers significantly affected grain yield and P and K content of soybean plants.
Growth Behavior and Management of Small Grains for Forage1
Authors: Holt Ethan C. 
Published: July 2010

SynopsisSmall grain growth was positively related to average daily temperature. The immediate response to any degree of defoliation was a loss in dry weight of the crown. The recovery period was determined by the degree of defoliation. Frequent defoliation reduced plant development and forage yield while height of cutting influenced the distribution of harvested forage during the season but not total yield.
Principles of Nutrient Uptake from Fertilizer Bands: V. Mechanisms Responsible for Intensive Root Development in Fertilized Zones1
Authors: Wilkinson S. R. , Ohlrogge A. J. 
Published: July 2010

SynopsisNitrogen‐fertilized roots were consistently higher in growth activity than roots not fertilized with nitrogen on a total roots per treatment basis. Phosphorus‐fertilized root extracts had less growth activity than nitrogen‐fertilized root extracts, and about equal or less growth activity than extracts from roots not fertilized with nitrogen or phosphorus.
Effect of Plant Spacing on the Development of Winter Wheat1
Authors: Wilson J. A. , Swanson A. F. 
Published: July 2010

SynopsisReduction of wheat populations below 20 plants per square foot through systematic spacing of the individual plants produced progressively lower yields at each level. The adverse effects of reduced stand were reflected primarily in decreased head number per unit area and test weight. Head number per square foot was lowered by thinning to any level, but test weight did not decrease until the population was reduced below 10 plants per square foot.
Estimation of Effect Coefficients Relating Soil Test Values and Units of Added Fertilizer1
Authors: Voss Regis , Pesek John 
Published: July 2010

SynopsisThe methodology for obtaining effect coefficients relating soil test units to fertilizer units from a multiple regression equation involving soil and fertilizer variables is presented. The developed procedures are empirically applied to a dry matter oat yield equation obtained from a greenhouse experiment involving soil and fertilizer N and P variables.
Effects of Four Amendments on Soil Physical and on Yield and Quality of Putting Greens1
Authors: Smalley R. R. , Pritchett W. L. , Hammond L. C. 
Published: July 2010

SynopsisPeat and vermiculite increased penetrability. Hydraulic conductivity was increased by fired clay and decreased by vermiculite and colloidal phosphate. Fired clay and peat increased noncapillary pore space while vermiculite and colloidal phosphate produced a decrease. Grass yield and quality were increased by vermiculite and colloidal phosphate treatments. Turf yield and quality decreased with an increase in hydraulic conductivity and in the force required to penetrate the soil. Bulk density was not a satisfactory index of grass‐producing ability of soil mixtures.
Method and Rate of Applying Zinc Sulfate for Corn on Zinc‐Deficient Soil in Western Nebraska1
Authors: Pumphrey F. V. , Koehler F. E. , Allmaras R. R. , Roberts Steve 
Published: July 2010

SynopsisApplication of 5 pounds of Zn per acre broadcast and plowed under before planting increased early growth and grain yield. Other methods of application were less effective. Greater rates of application increased Zn concentration in young and nearly mature corn. Small amounts of N banded with ZnSO4 enhanced the effectiveness of ZnSO4. Yields of corn grain were related to Zn concentration of the index leaf.
Controlling Release of Fertilizer Constituents by Means of Coatings and Capsules1
Authors: Dahnke W. C. , Attoe O. J. , Engelbert L. E. , Groskopp M. D. 
Published: July 2010

SynopsisPlacement of fertilizers in polyethylene capsules effectively controlled the rate of release of the fertilizer constituents for corn and Kentucky bluegrass in the field, but did not significantly increase yield or recovery of the constituents. In the greenhouse, significant increases in recovery of N were obtained by corn for (NH4)2SO4 coated with wax and pelleted, but yields were not significantly affected.
Serological Groups of Rhizobium japonicum Recovered from Nodules of Soybeans (Glycine max) in Field Soils1
Authors: Johnson Herbert W. , Means Ura Mae 
Published: July 2010

SynopsisGroupings of isolates indicated a different population of bacteria in the nodules of plants grown in different soils. In 5 of 6 soils, 49 to 82% of the isolates were of 1 or 2 predominant groups with the predominant groups differing among soils. Populations of bacteria in nodules of greenhouse and field plants grown in a given soil were essentially the same.
Effect of Fatty Alcohol on Evaporation and Transpiration1
Authors: Aubertin G. M. , Gorsline G. W. 
Published: July 2010

SynopsisTotal water usage, evaporation, and plant growth were reduced. Transpiration was reduced by the first increment of fatty alcohol, due to decreased plant growth, but no further change occurred with additional increments. All treatments required the same amount of transpiration water to produce one gram of oven‐dry material. Total water usage per gram of material actually increased with the addition of alcohol because plant growth was decreased proportionately more than transpiration.
Stand Longevity Studies with Birdsfoot Trefoil1
Authors: Miller John D. , Kreitlow K. W. , Drake C. R. , Henson P. R. 
Published: July 2010

SynopsisDisease scores, stand counts, and yields and the interrelation of these factors were studied. Stands declined rather steadily and root diseases became more serious with time. Yields varied widely from season to season. Correlations were generally significant.
Effect of Plant Population and Planting Pattern of Corn on Water Use and Yield1
Authors: Yao Augustine Y. M. , Shaw R. H. 
Published: July 2010

SynopsisThere was less water use from a 21‐inch row spacing than for 32‐ or 42‐inch spacings. A higher rate of water use occurred with higher stands, but the increase in water use was much smaller than the stand increase. The efficiency of water use was highest on the 21‐inch row spacing and the lowest on the 42‐inch spacing.
Energy Balance as Affected by Height and Maturity of Sudangrass1
Authors: Fritschen Leo J. , van Bavel C. H. M. 
Published: July 2010

SynopsisEvapotranspiration rates of 75‐ and 100‐cm. crops of sudangrass were similar and considerably larger than that of the 140‐cm. height. This difference appeared to be due to the presence of seedheads rather than physiological maturity. It was also shown, for days of similar energy input, that evapotranspiration increased with wind speed. These facts emphasize the point that for well‐watered sudangrass, physical rather than physiological factors regulated the evapotranspiration.
Soil Temperature and Phosphorus Effects Upon Nutrient Absorption by Barley1
Authors: Power J. F. , Grunes D. L. , Reichman G. A. , Willis W. O. 
Published: July 2010

SynopsisN and P absorption by barley was maximum at soil temperatures near optimum for dry matter production. Optimum temperatures were 52 to 59° F. for a soil low in P, and slightly higher for a soil higher in NaHCO3‐soluble P. Fertilizer P absorption was more dependent upon soil temperature than was the absorption of soil P. The relation between dry weights and percent P in plant tops varied with temperature. The “critical level” for P was lowest, and the efficiency of P utilization was highest at the 59° F. temperature.
Yield and Chemical Composition of Sudangrass and Forage Sorghum Under Three Systems of Summer Management for Late Fall in Situ Utilization1
Authors: Burns J. C. , Wedin W. F. 
Published: July 2010

SynopsisAfter‐frost sampling of the aftermaths of forage sorghum and sudangrass from 3 summer cuts, 1 summer cut, and no summer cuts showed no significant change in dry matter yield or percent crude protein. A significant linear increase in percent crude fiber within managements was noted; concentrations of prussic acid decreased sharply. When stockpiled, mature forage sorghum resulted in lower percent crude fiber than immature stages and appreciably lower than comparable growth stages of sudangrass.
Phosphorus Availability in Reddish Brown Lateritic Soils. I. Laboratory Studies1
Authors: Alban L. A. , Vacharotayan S. , Jackson T. L. 
Published: July 2010

SynopsisNH4F extracted Al‐phosphates plus monoor di‐calcium phosphate, NaOH extracted Fe‐phosphates, and H2SO4 extracted calcium phosphates remaining in the sample. Adding mono‐calcium phosphorus to 2 soils increased the NH4F‐ and the NaOH‐extractable P but had no effect on the H2SO4‐extractable P. NH4F‐ and H2SO4‐extractable P in soil correlated best with P content of oats and clover. Uptake of P by oats and clover during a cropping period was significantly correlated with loss of NH4F‐extractable P from the soil.
Relationship of Stem Solidness to Yield and Lignin Content in Wheat Selections1
Authors: McNeal F. H. , Watson C. A. , Berg M. A. , Wallace L. E. 
Published: July 2010

SynopsisHighly significant r values of −0.846 in 1962 and −0.825 in 1963 were obtained between bushels per acre and stem solidness in a Thatcher6 ✕ Rescue cross. Lignin content of selections in 1962 was not associated with stem solidness, percent sawfly tunneling, or percent sawfly cutting.
A Comparison of Pearl Millet, Sudangrass and Sorghum‐Sudangrass Hybrid as Pasture for Lactating Dairy Cows1
Authors: Clark N. A. , Hemken R. W. , Vandersall J. H. 
Published: July 2010

SynopsisComparable dry matter yields, carrying capacity, and milk yields were obtained from all pastures. Significant depression of butterfat occurred in cows grazing pearl millet. High grain levels depressed butterfat regardless of forage treatment and was additive to butterfat depression of cows grazing pearl millet. Crude protein showed seasonal variation in all years, but substantial differences between forages occurred only in 1962. Nitrate levels in pearl millet were generally higher than in the other forages.
Soil Strength and Seedling Emergence Relations. I. Soil Type, Moisture Tension, Temperature, and Planting Depth Effects1
Authors: Parker J. J. , Taylor H. M. 
Published: July 2010

SynopsisIn laboratory studies, the relation between soil strength and grain sorghum emergence was established for 6 soils. Soil moisture tension, planting depth and plant species affected the emergencea at specified soil strengths. Soil temperaturea ffected the rate of sorghum emergence but not the relation between soil strength and final emergence.
Phosphorus and Nitrogen Utilization by Rape, Flax, and Wheat1
Authors: Racz G. J. , Webber M. D. , Soper R. J. , Hedlin R. A. 
Published: July 2010

SynopsisFertilizers containing nitrogen and phosphorus gave a larger increase in yield of rape than of wheat or flax. This appeared to be due to the more rapid uptake and the greater requirement of rape for these elements.
Comparative Efficiency of Liquid and Peat‐Base Inoculants on Field‐Grown Soybeans (Glycine max)1
Authors: Burton J. C. , Curley R. L. 
Published: July 2010

SynopsisBoth types of inoculant were effective when the seed were planted 1 day after inoculating, but when seed were held for 7, 14, or 21 days before planting, the peat‐base inoculant proved superior in bringing about effective nodulation and higher yields. The efficiency of the liquid inoculum for preinoculating soybeans was not improved appreciably by increasing the number of rhizobia 2½ times. Possible explanations of the superiority of the peat base inoculum are discussed.
Effectiveness of Preplanting Tillage in Relation to Herbicides in Controlling Johnsongrass for Soybean Production1
Authors: McWhorter C. G. , Hartwig E. E. 
Published: July 2010

SynopsisAdequate control of established johnsongrass in soybeans was obtained by use of summer‐fallow cultivation or intensive preplanting tillage. Soybeans planted following 6 to 10 diskings yielded more than soybeans grown in the conventional manner and as much as soybeans grown in plots where johnsongrass was controlled with herbicides. Disking appeared to provide more control than chemicals applied as recommended. The effectiveness of frequent disking in johnsongrass control appeared to be directly related to rhizome dehydration.
Influence of Light Intensity, Temperature and Growing Period on the Growth, Chemical Composition and Digestibility of Culver and Tanverde Alfalfa Seedlings1
Authors: Garza T. Ricardo , Barnes R. F. , Mott G. O. , Rhykerd C. L. 
Published: July 2010

SynopsisDry matter accumulation and cellulose content of two alfalfa varieties increased with advancing maturity and increasing light intensity while crude protein and in vitro digestibility decreased. Soluble carbohydrates were greatest under high light intensity with alternating day and night temperatures of 30° C. and 15° C., respectively. Dry matter accumulation was greatest under high temperature and high light intensity, but digestibility was lower as temperature increased.
Effects of Simulated Drought by Polyethylene Glycol Solutions on Corn (Zea mays L.) Germination and Seedling Development1
Authors: Parmar M. T. , Moore R. P. 
Published: July 2010

AbstractDrought conditions were simulated in the laboratory by using aqueous solutions having osmotic pressures from 1 to 10 atmospheres. “Carbowax” polyethylene glycol 6000 was used as the solute. Germination percentages and subsequent seedling growth of two lots of corn, differing in embryo soundness, progressively decreased with increased osmotic pressures. The effects of the high osmotic pressures were more adverse in the low than in the high quality seed lot. Soundness of embryos as revealed by tetrazolium tests was closely related to growth performance. The germination of seed under simulated drought conditions offers possibilities for revealing seed weaknesses and predicting relative differences among seed lots in field emergence.
Effect of Corn Population on Yield, Evapotranspiration, and Water‐Use Efficiency in the Northwest Corn Belt1
Authors: Timmons D. R. , Holt R. F. , Moraghan J. T. 
Published: July 2010

AbstractIn 1963 and 1964, experiments were conducted in western Minnesota, eastern South Dakota, and south‐eastern North Dakota to study the effect of corn stand on yield, evapotranspiration, and water‐use efficiency at different stages of plant growth. Five corn populations, within the limits of 6,000 to 24,000 plants per acre, were planted in a Latin square design at 7 and 10 locations during 1963 and 1964, respectively.Under adequate moisture conditions in 1963, yields ranged from 60 to 134 bushels per acre at optimum stands of 14,000 to 22,000 plants, whereas, yields of 1 to 75 bushels at stands of 6,000 to 12,000 plants per acre were produced under the limited moisture conditions in 1964.Evapotranspiration from planting to maturity ranged from 13.5 to 20.6 inches and from 9.4 to 17.1 inches for 1963 and 1964, respectively. Except at 2 of the 17 locations, evapotranspiration was not affected significantly by stand at any growth stage during the 2‐year period.Water‐use efficiency increased as corn yield increased and reached a maximum of 454 pounds (8.1 bushels) of corn per inch of evapotranspiration. No definite relation of water‐use efficiency to stand was found for grain yields since optimum corn stands were related to growing seasons. Forage production and water‐use efficiency generally increased with higher plant populations, so there was a close relationship between them during the 2‐year period.