bluuebunny/crossref_metadata_2025_split huggingface dataset:
Artificial Drying and Storage of Smooth Bromegrass Seed1
Authors: Grabe Don F. 
Published: July 2010

SynopsisFreshly harvested bromegrass seed containing up to 28% moisture was successfully dried with a field drier in less than 6 hours without lowering viability of the seed. Bromegrass resisted heat injury from temperatures that have been reported harmful to several other grass species. Laboratory studies showed that resistance to heat injury increased with lowered moisture content of the seed. For safe storage, the moisture content of bromegrass seed should be reduced to 12 percent or less soon after harvest.
Nutrient Uptake and Chemical Composition of Tobacco Plants as Affected by the Composition of the Root Atmosphere1
Authors: Harris D. G. , van Bavel C. H. M. 
Published: July 2010

SynopsisThe roots of tobacco plants were subjected to a wide range of simulated aeration conditions. In general nutrient uptake remained relatively constant until oxygen concentrations dropped below 10%. However, a concentration of 5% carbon dioxide apparently stimulated phosphorus uptake.
Incidence of Rust on Irrigated Wheat as Affected by Time of Sowing and Rate and Time of Nitrogen Fertilization1
Authors: Wahhab A. 
Published: July 2010

SynopsisDate of sowing, application of nitrogen and time of application acted independently in affecting the incidence of rust in wheat. Date of sowing had no effect on rust incidence. Time of nitrogen application affected incidence of rust only at the low levels of infection. Application of nitrogen increased the incidence of rust significantly.
Pollen Tube Growth, Fertilization and Early Development in Avena sativa1
Authors: Brown Charles M. , Shands H. L. 
Published: July 2010

SypnosisPollen germinated and tubes entered the style within 5 minutes after pollination of common oats, Avena sativa. The tube passed between cells of the conducting tissue near the center of style and into the ovary. The male generative nuclei were near the egg nucleus and polar nuclei within 30 minutes. Within 4 hours the male gamete had entered the egg. The fertilized egg was in prophase 13.5 hours after pollination and a two‐celled proembryo was observed 19 hours after pollination.
Influence of Various Legumes on the Yields of Succeeding Corn and Wheat and Nitrogen Content of the Soil1
Authors: Doll E. C. , Link L. A. 
Published: July 2010

SypnosisThe application of ground limestone in every instance resulted in significant increases in the yields of corn and wheat. The yields of corn and wheat following soybeans were much lower than those following the other legumes. Lespedeza compared very favorably with the clovers. The yields in all cases tended to increase throughout the duration of the experiment. Except for a decrease on the plots on which soybeans were grown for hay, soil nitrogen was maintained at, or near, the original level.
An Undergraduate Seminar in Agronomy1
Authors: Ronningen T. S. 
Published: July 2010

SypnosisThe undergraduate seminar in agronomy at the University of Maryland has been divided into two phases. One phase consists of individual presentations of current agronomic topics with liberal provisions for critical discussions and class analyses of the presentations. In the other portion of the seminar, career opportunities, including those associated with graduate work, have been discussed with representatives of industry, government, and the University.
Quality Characteristics of Two Pairs of Isogenic Lines of Wheat1
Authors: Atkins I. M. , Finney Karl F. 
Published: July 2010

SynopsisPaired isogenic lines, differing in one case in the presence or absence of awns and in the other in seed coat color, were compared in quality characteristics over a 3 year period in Texas and in regional nurseries. Within the limits of measuring quality now available, the pairs were identical. However, the awned segregate averaged 0.52 pound greater in test weight.
Genetic Recombinations in a Hybrid Involving Three Species of Gossypium1
Authors: Lewis Charles F. 
Published: July 2010

SynopsisThe F2 and F3 progenies of Gossypium arboretum‐thurberi‐hirsutum were extremely variable in plant habit, seed cotton production, and all lint properties. There is an opportunity to develop from this material new combinations of lint length, strength, and fineness which should be stabilized into relatively true breeding stocks and later used in a breeding program to improve the quality of cotton.
The Inheritance and Influence of a Dominant Chlorophyll Deficient Character in Wheat1
Authors: Jensen Neal F. 
Published: July 2010

SynopsisA chlorophyll deficient character, inherited as a simple dominant, reduced yield, height, and 1,000‐kernel weight in segregates from a cross with Yorkwin winter wheat. Reductions which were statistically significant were approximately 13% for yield, 4% for height, and 5% for 1,000‐kernel weight.
Selection for Yield in Bulk Hybrid Soybean Populations with Different Plant Spacings1
Authors: Weber Charles R. 
Published: July 2010

SynopsisSelection of single plants superior for yield and constant maturity was practiced in drilled 4‐ and 8‐inch plant spacings from 6 bulk hybrid soybean populations. The progenies of these selections evaluated in replicated drilled plantings showed no yield, height nor lodging differences among spacings within crosses. Phenotypic selection in drilled plantings resulted in slightly later maturity in final evaluations than did selection in wider plant spacings.
Recognition of Extra‐Curricular Activities1
Authors: Pendleton John D 
Published: July 2010

SynopsisEducation depends on at least three basic principles (1) understanding, (2) application, and (3) attitude. Attitude is the ingredient that is most out of focus. Emphasis on striving for excellence, rigor of thinking, thoroughness, and on acceptance of the idea that man cannot attain perfection through environment is needed. Extra‐curricular activities provide a way of testing some of the principles and ideas gained in the classroom. Positive institutional policy defining, emphasizing and reflecting such attitudes in all phases of extra‐curricular activities would give meaning and direction to these critical activities.
A Comparison of Grass‐Legume Mixtures and Grass Under Irrigation as Pastures for Yearling Steers1
Authors: VanKeuren R. W. , Heinemann W. W. 
Published: July 2010

SynopsisIn irrigated pasture studies with yearling steers, grass‐legume mixtures produced greater beef yields per acre and higher average daily gains than grasses. Cattle that grazed the grass‐legume pastures attained a higher degree of finish than those on the grass pastures. The ability of alfalfa to withstand grazing was shown by the high percentage of this legume in the pastures at the end of 3 years of grazing.
Principles of Nutrient Uptake From Fertilizer Bands 1. Effect of Placement of Nitrogen Fertilizer on the Uptake of Band‐Placed Phosphorus at Different Soil Phosphorus Levels1
Authors: Miller M. H. , Ohlrogge A. J. 
Published: July 2010

SynopsisPlacement of nitrogen fertilizer caused a relative increase in the feeding power of the root system on the band‐placed phosphorus. Nitrogen had a greater influence when mixed with the phosphorus than when placed in a band 3 to 4 inches from the phosphorus band. The influence was nearly independent of the soil phosphate level when the nitrogen was mixed with the band phosphorus, but was not independent of the soil phosphate level when the nitrogen was separated from the phosphorus band.
Effect of Nitrogen Fertilization on Symptom Development, Nitrogen Content and Nitrogen Uptake of Spring Wheat Infected With Barley Stripe Mosaic1
Authors: Army T. J. , McNeal F. H. 
Published: July 2010

SynopsisNitrogen fertilization generally increased visual disease symptoms in eight spring wheat varieties infected with barley stripe mosaic and grown in irrigated plots. The nitrogen content of the diseased plants was higher than that of the non‐diseased, and was not affected by nitrogen fertilization. Diseased plants, because of lessened growth, absorbed less soil and fertilizer nitrogen.
Factors Affecting Yield and Quality of Dryland Grasses1
Authors: Stitt R. E. 
Published: July 2010

SynopsisYields of 7 species of grass were highly correlated with April–May precipitation (2.24 to 6.18 inches) during an 8‐year period. Ladak alfalfa grown with crested wheatgrass increased total yields during the last 5 years of an 8‐year period, owing possibly to nitrogen contributed by the alfalfa. Fifty pounds of nitrogen and 20 pounds P2O5 applied to 8‐year‐old stands increased yields of all species and mixtures. Renovation decreased yield during the treatment year and increased yields the year following.
Varietal Differences in Survival of Alfalfa Seedlings Infested With Spotted Alfalfa Aphids1
Authors: Hackerott H. L. , Harvey T. L. , Sorensen E. L. , Painter Reginald H. 
Published: July 2010

SynopsisAlfalfa varieties in the seedling stage varied widely in percentages of survival following infestation with spotted alfalfa aphids. Alfalfas of Turkistan origin generally ranked highest. Resistant plants may be selected from most varieties tested as indicated by the increased survival of polycross progenies of plants surviving seedling infestation. Greenhouse results are indicative of field reaction to natural infestation at least in the seedling stage at relatively high temperatures.
Effect of Depth of Placement of Exchangeable Ammonium‐nitrogen on Rice Paddy1
Authors: Wahhab A. , Azim M. N. 
Published: July 2010

SynopsisPlacement of exchangeable NH4‐N (NH4‐clay) at 2 inches below the surface gave highest yields of paddy grains and total dry matter. Deeper placements induced the vegetative growth more than grain formation. The difference in yields of surface application and 2‐inch placement was not significant.
A Comparison of the Pedigree and Bulk Methods of Breeding Soybeans1
Authors: Torrie James H. 
Published: July 2010

SynopsisNo significant differences in plant height, lodging index, bacterial blight reaction, oil and protein content of the seed and iodine number of the oil were found between the mean response of soybean lines developed by the pedigree and bulk methods. With two exceptions, in which the bulk lines showed superiority, mean seed yields also were similar for the two methods of breeding. The mean maturity of lines were similar for the two methods of breeding with the exception of the early group in which the bulk lines were four days later.
Inheritance of Hydrocyanic Acid Production in Crosses Between Sorghum and Sudangras1
Authors: Carlson Irving T. 
Published: July 2010

SynopsisLow HCN was associated with the following simply inherited characters: green striped −1, golden −1, golden −2, yellow leaf tip, single seeded spikelets, Chiltex leaf spot, and normal green as contrasted with green striped −2 in Tift × 15. Pleiotropy seemed more likely than linkage to explain several of the associations. High HCN was associated with stem coarseness in several progenies. Low HCN was dominant in the F1 of crosses involving line 109.
Forage and Root Growth of Five Sweetclover Varieties and Their Influence on Two Following Corn Crops1
Authors: Pumphrey F. V. , Koehler F. E. 
Published: July 2010

SynopsisSpanish, Evergreen, and Madrid sweetclovers differed little in dry matter production and nitrogen content in first‐ and early second‐year growth and exceeded common white only in first‐year growth. Hubam produced more forage, but contained no more nitrogen per acre. The biennial varieties did not differ appreciably in quantity of roots per acre. Nearly 90% of the roots were in the top foot. Nitrogen content of the roots decreased with increasing depth.
Variations Among Seedlots of Certified Ladino Clover and Other White Clovers1
Authors: Jackobs J. A. , Hittle C. N. 
Published: July 2010

SynopsisDifferences in plant size, flowering, winter survival, and leafhopper damage in Ladino and white clover seedlots indicated that the system of seed certification, from which the Ladino lots were selected, was inadequate to insure that all seedlots were the same genetically. Larger plants flowered later in the season than smaller plants. Numerous leafhopper‐resistant plants were found in the comparatively susceptible Ladino. There was a positive correlation of fall vigor with petiole diameter, winter survival, and leafhopper damage.
Some Responses of Alfalfa (Medicago Sativa L.) to Different Lengths of Day and Growth Regulators in the Greenhouse1
Authors: Massengale M. A. , Medler J. T. 
Published: July 2010

SynopsisAlfalfa plants grown under 14 hours of light were more vigorous in growth, had larger leaves and longer internodes, and were taller than those grown under 12 hours. Flowering of plants was profuse in the longer daylength, but was sparse, if present at all, under shortday conditions. Spraying with different growth‐regulators altered the heights of plants, length of internodes, and flowering response. Formative effects were also evident from treatment with certain of the chemicals.
Education for Agronomists of the Future. A Panel Discussion1
Authors: Folks H. C. , York E. T. , Thorne Wynne , Mulvaney Merle , Watkins L. V. 
Published: July 2010

SynopsisI. An increasingly technical agriculture and an increasingly complex society suggest that in agronomic training increased emphasis should be placed upon (1) the physical and biological sciences (2) social sciences and humanities and (3) economics and business. II. Additional time required for this could be obtained by the elimination of duplication and some applied courses. III. IV. Motivation of the student to acquire this sound education and to develop personal competence and pride in the profession is the joint responsibility of staff and student and is more easily accomplished when there are good relations between the two.
The Heritability of Milling Quality in Wheat as Measured by the Separation of the Bran and Endosperm1
Authors: Everson E. H. , Seeborg E. F. 
Published: July 2010

SynopsisGene number affecting milling quality in a wheat cross (Norin 10 × Brevor‐14) × Burt could not be determined using the partitioning method of genetic analysis. The components of variance were partitioned and a heritability of 35.50% was determined for this character. Estimates of expected genetic gain indicated good progress could be made in a recurrent selection program for milling quality as measured by the separation of bran and endosperm.
Factors Affecting the Expression of Bacterial‐Induced Chlorosis of Soybeans1
Authors: Johnson Herbert W. , Means Ura Mae , Clark Francis E. 
Published: July 2010

SynopsisThe expression of bacterial‐induced chlorosis in several varieties of soybeans was affected by the concentration and proportions of major nutrients, by different sand substrates, and other plant treatments. The most susceptible varieties developed light to severe chlorosis in all treatments. Less susceptible varieties developed light to moderate chlorosis in most treatments but appeared to be completely resistant in others. Two varieties previously classed as completely resistant developed chlorosis in some treatments.
Yield and Protein Content of Wheat in Central Mexico as Affected by Available Soil Moisture and Nitrogen Fertilization1
Authors: Fernández G. Ramón , Laird R. J. 
Published: July 2010

SynopsisOwing to soil moisture differences, grain yields were increased by 85% and straw yields by 187% in heavily fertilized wheat. Maintenance of the available soil moisture percentage above 30 was necessary for maximum grain yields. The protein content of the whole grain was decreased by small applications of nitrogen and was increased by large applications. Protein content was lowest in the wettest treatment and highest in the driest treatment.
Artificial Pollen Germination for Selection of Improved Seed Production in Paspalum Dilatatum, Poir1
Authors: Bennett Hugh W. 
Published: July 2010

SynopsisThe germination of Dallisgrass pollen on artificial media shows no significant differences between high and low seed producing selections, sugar concentrations, degrees of acidity, or media. Temperatures of 30° C. and below are indicated as best for germination on artificial media. Artificial pollen germination was found to be unreliable as a basis of selection for improved seed production in Dallisgrass.
The Effects of Stem Type on Some Feeding Qualities of Sericea Lespedeza, L. cuneata, as Indicated in a Digestion Trial with Rabbits
Authors: Donnelly E. D. , Hawkins G. E. 
Published: July 2010

SynopsisRabbits consumed more fine‐stemmed sericea than coarse‐stemmed. The fine contained more total digestible nutrients, crude fiber, and nitrogen‐free extract than the coarse and the digestibility of these constituents was greater in the fine‐stemmed forage. The coarse‐stemmed type contained more ash and the digestibility of this constituent was higher than in the fine‐stemmed. There was no difference indicated in digestibility of the crude protein and cellulose in the two diets.
The Development of Mitochondria in the Scutellum of Germinating Corn1
Authors: Hanson J. B. , Vatter A. E. , Fisher M. E. , Bils R. F. 
Published: July 2010

SynopsisDuring the initial days of germination and seedling growth there is an increase in the mass and oxidative activity of mitochondria isolated from corn scutellum. Electron micrographs of isolated mitochondria show them to increase in size.
Effects of Vertical Mulching and Subsoiling on Soil Physical Properties1
Authors: Parr J. F. 
Published: July 2010

SynopsisFavorable changes in bulk density and aggregation have resulted from a new method of subsoiling called vertical mulching. Ten and 14 months after treatment it was found that bulk density values for vertical mulching were significantly lower than for ordinary subsoiling, and aggregate index values were usually higher for the vertical mulching treatment.
Effect of Corn Planting Pattern on Yield, Root Extension, and Interseeded Cover Crops1
Authors: Haynes J. L. , Stringfield G. H. , Johnson W. H. 
Published: July 2010

SynopsisAmong 8 corn‐planting patterns inter‐planted with cover crops, more improvement in stand establishment of cover crops per bushel reduction in corn yield occurred in corn drilled in 63‐inch rows than in hilled patterns of various dimensions.
Effect of Length of Rotation on Losses from Black Shank in Flue‐Cured Tobacco Varieties1
Authors: Matthews E. M. , Kroontje Wybe , Henderson R. G. 
Published: July 2010

SynopsisFive flue‐cured tobacco varieties were grown in rotations on a black shank‐infested soil. In the 1‐year rotation, losses from black shank increased rapidly in succeeding tobacco crops, while in the 3‐year rotation losses decreased. The difference in black shank losses between the 3‐ and 1‐year rotations was significant in 1956 and 1957. The black shank pathogen was not eliminated from the soil by a 3‐year rotation or a 4‐year period between tobacco crops.
The Relation Between Environmental and Genetic Variances for Heading Dates and Plant Heights in Oats1
Authors: Frey K. J. 
Published: July 2010

SynopsisIn 22 oat crosses studied in the F2 to F6 generations the environmental and genetic variances for heading date were positively associated, whereas for plant height they were independent. Apparently the environmental factor which most influences heading date interacted differently with the genotype than did the factor or factors having major influence upon plant height.
Effect of Freezing Temperatures on Pre‐emerged Dubois Winter Oat Seedlings1
Authors: Kinbacher E. J. 
Published: July 2010

SynopsisThe cold tolerance of pre‐emerged Dubois seedlings decreased with advancing age until the day prior to emergence, then there was a marked increase in cold tolerance. Different survival percentages were recorded from two sources of Certified Dubois seed. There was no significant change in water soluble protein content of the pre‐emerged seedlings with advancing age.
Gene Interaction in Ricinus Communis, L.1
Authors: Creech R. G. , Kramer H. H. 
Published: July 2010

SynopsisThe major phenotypes in the wide range of plant and capsule colors in Ricinus communis, L. were accounted for by the action and interaction of at least three major genes. One partially dominant gene controlled the production of spines on capsules. The interaction of three genes was demonstrated in the inheritance of waxy bloom.
Frost Injury to Maturing Barley1
Authors: Robertson D. W. , Haus T. E. , Hoff J. C. 
Published: July 2010

SynopsisFrost damage reduced malting quality, weight per 100 kernels, and germination in all samples subjected to freezing temperatures at the milk, soft dough, and tough dough stages of maturity. Freezing temperatures at the turning stage of maturity caused visible damage in which the kernels were shrivelled, reduced in germination, and increased in nitrogen content. Heads subjected to freezing temperatures when ripe showed little damage. Most of the damage occurred in the first hour of exposure.
Effect of Certain Fertility and Management Treatments on the Growth and Early Development of Rhizomes of Two Varieties of Smooth Bromegrass1
Authors: Hertz L. B. 
Published: July 2010

SynopsisSeedlings of two varieties of Bromus inermis, Lyon and Canadian certified, produced more rhizomes when kept free of weeds than when weeds were clipped or where a companion crop was used. The production of rhizomes by Lyon (southern) was greater than was the production by Canadian certified (northern) in most instances. The addition of fertilizer did not increase significantly the development of rhizomes.
Respiration of Soybean Seeds as Related to Weathering Losses during Ripening1
Authors: Howell Robert W. , Collins F. I. , Sedgwick V. E. 
Published: July 2010

SynopsisRespiration of ripening soybean seed was closely correlated with seed moisture content. Temperature affected the respiration rate, but was less important than moisture content. Solids in the Ieachates collected under plants exposed to rain and under intact pods exposed to simulated rain consisted mainly of materials such as salts which were burned to ash. Sugar contents of these leachates were very low compared to a leachate collected under shelled seeds.
Preliminary Evaluation of Exotic Maize Germ Plasm1
Authors: Kramer H. H. , Ullstrup A. J. 
Published: July 2010

SynopsisSources of resistance to common corn rust, southern corn rust, and 2 leaf blights were isolated from maize introductions. A large number of mutant endosperm and seedling characters were uncovered by selfing. Preliminary study of combining ability with a well‐established single‐cross hybrid, Wf9 ✕ Hy, showed that very few introductions can be expected to provide additional yield factors but that the greatest contribution will come from introductions which are in themselves relatively desirable.
Nitrate Content of Soils and Nitrogen Content of Oat Plants as Affected by Rates of Liming1
Authors: Ogata G. , Caldwell A. C. 
Published: July 2010

SynopsisLime brought about moderate increases in the amount of nitrate nitrogen in an acid Skyberg silt loam under fallow. Moderate rates (4 tons per acre) were as effective as heavy rates (16 tons per acre). Fallowing for 2 years resulted in the accumulation of up to 1,000 pounds of nitrate per acre in the top 2 feet of soil. Nitrate in a successively cropped soil amounted to only a few pounds per acre. Consistent, but seldom statistically significant, increases in the nitrogen content of oats were brought about by lime applications.
Gaseous Loss of Ammonia from Nitrogen Fertilizers Applied to Soils1
Authors: Kresge C. B. , Satchell D. P. 
Published: July 2010

SynopsisNo appreciable ammonia volatilized when less than 100 pounds of nitrogen per acre as urea was topdressed on soils with pH values below 6.3. Large ammonia losses took place when higher rates of urea were surface‐applied to bare soil and when soil drying occurred shortly after urea application.