bluuebunny/crossref_metadata_2025 huggingface dataset:
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

Synopsis

Alfalfa 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

Synopsis

I. 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

Synopsis

Gene 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

Synopsis

The 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.
Evaluation of Timothy Clones for Stem Rust Reaction1
Authors: Nielsen E. L. , Dickson J. G.
Published: July 2010

Synopsis

Two inoculations, one made during vegetative growth and the other at or immediately following heading, were necessary to eliminate stem rust susceptible plants of timothy. A single reading, made approximately three weeks following inoculation, may be sufficient for screening plants beyond seedling stages.
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

Synopsis

Owing 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

Synopsis

The 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.
Contamination in Seed Fields of Corn Resulting from Incomplete Detasseling1
Authors: Hutchcroft C. D.
Published: July 2010

Synopsis

Distance from contaminating pollen and date of silking influenced contamination sufficiently so that these factors should be given consideration in any modification of the minimum standards for certification.
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

Synopsis

Rabbits 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

Synopsis

During 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

Synopsis

Favorable 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

Synopsis

Among 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

Synopsis

Five 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

Synopsis

In 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.
Defining Agricultural Seasons in the Middle Latitudes1
Authors: Newman James E. , Wang Jen‐Yu
Published: July 2010

Synopsis

This study classifies the annual timetable of climatic change into natural agricultural seasons. The classificational criterion used is based on the responses of various field crops to the distribution of daily maximum and minimum temperatures, within weekly periods.
Effect of Freezing Temperatures on Pre‐emerged Dubois Winter Oat Seedlings1
Authors: Kinbacher E. J.
Published: July 2010

Synopsis

The 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

Synopsis

The 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

Synopsis

Frost 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

Synopsis

Seedlings 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

Synopsis

Respiration 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

Synopsis

Sources 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

Synopsis

Lime 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

Synopsis

No 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.
Response of Soybeans to Seed‐Treatment with Gibberellin Under Simulated Commercial Conditions1
Authors: Howell R. W. , Wargel C. J. , Brim C. A. , Hartwig E. E. , Lambert J. W. , Thompson J. R. , Stefansson B. R. , Park J. K. , Seigler W. E. , Webb B. K.
Published: July 2010

Synopsis

The response of soybeans to seed treatment with gibberellin was studied at eight locations from Winnipeg, Man., to Coahoma, Miss. Stands and yields were reduced by applications of either 2 or 8 g. potassium gibberellate per bushel of seed. While treated plants were taller in the seedling stage, at maturity the controls were more than 5 inches taller than treated plants in most cases. Maturity and oil and protein contents of the seed were not affected consistently by gibberellin treatment.
Sterility in Sudangrass: I. Barren‐ and Chimeral Partial‐Sterility1
Authors: Townsend C. E.
Published: July 2010

Synopsis

A barren‐sterile character, manifested by the absence of floral parts and sexual organs, was inherited as a monogenic recessive. A few seeds were observed on barren‐sterile plants in one progeny. The chimeral partial‐sterile character was believed to be controlled by recessive genes which were quite mutable. The mode of inheritance was not determined.
Nitrogen Utilization in High and Low Protein Wheat Varieties1
Authors: Seth Jagdish , Hebert T. T. , Middleton G. K.
Published: July 2010

Synopsis

No differences were found in total nitrogen content of vegetative parts of high and low protein wheat varieties prior to heading. After heading nitrogen increased more rapidly in the heads of high protein varieties. Varietal differences in protein content of the kernels were not decreased by growing plants in solution culture, or by foliar applications of urea or nitrate nitrogen.
Influence of Fertilizer Analysis and Placement on the Emergence, Growth, and Nutrient Absorption by Wheat Seedlings in the Greenhouse1
Authors: Lawton K. , Davis J. F.
Published: July 2010

Synopsis

Under greenhouse conditions, contact placement of wheat seed with 5‐20‐20 fertilizer at the rate of 500 pounds per acre seriouly delayed and reduced emergence of seedlings and subsequent growth. Similar placement of seed with 5‐20‐0 fertilizer was only slightly detrimental. Applying mixed fertilizer in a band below or 1½ inches to the side and 1½ inches below the seed was most desirable from standpoint of emergence, growth, and uptake of fertilizer phosphorus.
Forage Production of Vernal Alfalfa Under Differential Cutting and Phosphorus Fertilization1
Authors: Parsons J. L. , Davis R. R.
Published: July 2010

Synopsis

A comparison of 6 cutting schedules with 3 phosphorus levels indicated that Vernal alfalfa produced maximum dry matter when cut 3 times annually. When cut 4 times the total protein production was the same but the percent protein was higher. Phosphorus applications helped to overcome detrimental effects of severe cutting schedules.
The Physiological Nature of Gene‐Controlled Growth Form in Trifolium Fragiferum L. I. Inheritance of Growth Form1
Authors: Bendixen Leo E. , Stanford E. H. , Peterson M. L.
Published: July 2010

Synopsis

Erect versus stoloniferous growth form in Salina strawberry clover is determined by a single gene, with stoloniferous being dominant over erect. Somatic reversion to the stoloniferous form is common in erect plants. Apparent instability patterns among six erect parents and their progenies at the erect locus suggest genetic control of this instability.
Evaluation of Four Testers of Different Ear Heights of Corn1
Authors: Thompson D. L. , Rawlings J. O.
Published: July 2010

Synopsis

Four single‐cross testers of different ear heights were about equally effective for measuring either ear height or yield of corn. A slight advantage was indicated for the two lowest yielding testers for yield evaluation.
Sterility in Sudangrass: II. Random and Nonrandom | Partial‐Sterility1
Authors: Townsend C. E.
Published: July 2010

Synopsis

Plants classified as having random partial‐sterility possessed normal appearing reproductive organs, although approximately 50% seed failure and 50% pollen abortion occurred. It was believed that this type of sterility was due to cryptic structural hybridity. Abnormal pistil development was characteristic of plants classified as nonrandom partial‐sterile. The breeding hehavior suggested that this character was genie controlled.
The Role of Genetics in the Use of Agricultural Chemicals
Authors: Wiebe G. A. , Hayes J. D.
Published: July 2010

Synopsis

The control of the phytocidal action of foliar applications of DDT on barley by a single major gene suggests that greater emphasis should be given to the role of genetics in the use of agricultural chemicals in attaining the dual goal of protecting the economic crop from both chemical and pest.
Root Development of Potatoes1
Authors: De Roo H. C. , Waggoner P. E.
Published: July 2010

Synopsis

Root penetration of potatoes was inhibited at plow depth by the hardpan which was induced by normal tillage. A complete shattering of this pan favored a deep and well‐developed root system. In fine sandy loam, compaction by traffic in the spray‐wheel furrow also restricted horizontal root development.
Effect of Gibberellic Acid Upon Seedling Emergence of Slow and Fast Emerging Wheat Varieties1
Authors: Allan Robert E. , Vogel O. A. , Craddock J. C.
Published: July 2010

Synopsis

Soaking seeds in solutions of gibberellic acid stimulated slow‐emerging wheat varieties to emerge at rates comparable to rapid‐emerging varieties under both greenhouse and field conditions. Gibberellic acid treatment adversely affected seedling survival of 3 rapid‐emerging varieties but did not influence survival of 2 slow‐emerging varieties. Treatment did not stimulate coleoptile elongation of any varieties tested.
Number of Lines Needed in Oat‐Variety Purification1
Authors: Wheat J. G. , Frey K. J.
Published: July 2010

Synopsis

Morphologically similar lines of Mo. 0‐205 and Clintland oat varieties derived from individual heads did not differ in yield at a single testing site or when the data from different sites were combined. Therefore, it is not necessary to select several hundred heads when repurifying an oat variety. One of 24 lines of Bonham was inferior in yielding ability.
Water Utilization by Field Corn in Western Minnesota1
Authors: Holt R. F. , Van Doren C. A.
Published: July 2010

Synopsis

Available soil water in depths to five feet indicate water usage to the fifth foot at kernel formation. The period of highest water requirement appears to be from tasseling to kernel formation. Water requirements decreased sharply after kernel formation. Forty to 50% of the water losses during the growing season could be accounted for by evaporation.
Bromegrass and Bromegrass‐Alfalfa Yields as Influenced by Moisture Level, Fertilizer Rates, and Harvest Frequency1
Authors: Lorenz Russell J. , Carlson Carl W. , Rogler George A. , Holmen Harold
Published: July 2010

Synopsis

Dry‐matter yields of bromegrass and a bromegrass‐alfalfa mixture were significantly increased by the application of irrigation water as compared with no irrigation. Irrigating at various soil moisture levels, however, had little or no effect on yield. Nitrogen fertilizer increased yields at all levels of soil moisture regardless of whether the forage was harvested at hay stage or clipped frequently to simulate removal of the forage by grazing. The percentage alfalfa in mixture with bromegrass increased with irrigation.
Effect of Nitrogen Fertilizer on Emergence and Seedling Growth of Forage Plants and Subsequent Production1
Authors: Ward C. Y. , Blaser R. E.
Published: July 2010

Synopsis

Nitrogen fertilizer applied at time of seeding influenced the percentage of emergence of all species in each seeding in proportion to the amount of nitrogen applied. In two experiments significant reductions in stands resulted. Seedling weights 28 days after emergence were not influenced by nitrogen fertilization; 56 days after emergence seedling weights were increased by higher nitrogen rates. Yields were usually depressed. Red clover and Ladino clover were depressed more than alfalfa and birdsfoot trefoil.
Effects of Seed Treatment and Foliar Spray Applications of Gibbberellic Acid on Grain Sorghum1
Authors: Pauli A. W. , Stickler F. C.
Published: July 2010

Synopsis

Rates of laboratory germination were increased by gibberellic acid in three varieties of grain sorghum. Field emergence rate in Midland grain sorghum was increased by dust and slurry applications to seed. Final emergence, maturity, plant height, grain yields, and components of yield were not influenced. Yields were not consistently increased by foliar sprays.
Nitrogen Application and Irrigation Frequencies for Western Wheatgrass Production on Clay Soil1
Authors: Schumaker Gilbert , Davis Sterling
Published: July 2010

Synopsis

Maximum yields were obtained by the combination of frequent, controlled irrigation and the application of high rates of nitrogen. A small percentage of the applied nitrogen was utilized by the plant.
Effect of Fertilization on the Crude Fiber Content and Crude Fiber‐Nitrogen Relationship of Coastal and Common Bermudagrasses1
Authors: Miller W. J. , Donker J. D. , Adams W. E. , Stelly M.
Published: July 2010

Synopsis

The crude fiber content of Coastal bermudagrass was not affected by level of N, P, or K fertilization. Only N fertilization materially influenced the nitrogen content of this forage. When clipping date was not a variable, the crude fiber and nitrogen content of Coastal forage were not significantly correlated. Increasing N fertilization reduced the crude fiber content of common bermudagrass. The correlation between crude fiber and nitrogen of this forage was −0.49.
Response of Red Clover Varieties at High Elevations in Colombia1
Authors: Crowder Loy V. , Echeverri Silvio
Published: July 2010

Synopsis

At the first harvest, varieties from southern United States exceeded the others in seedling vigor and forage yields. In subsequent harvests, varieties from 38° to 45° N were equal or superior. The production of varieties originating above 50° N was low. Flowering decreased in order for southern, middle, and northern varieties. Medium red varieties were characterized on the basis of growth type. A shift in type was noted when seeds had been multiplied in a region different from that of varietal origin.
Effect of Topping on Moisture Loss, Dry Matter Accumulation, and Yield of Corn Grain1
Authors: Cornelius P. L. , Russell W. A. , Woolley D. G.
Published: July 2010

Synopsis

Corn topping resulted in significant increases in rate of moisture loss for some treatments, but all reductions were small and appeared to be of no practical value. Topping below the 6th leaf on or before 40 days after silking in 1958 and on or before 30 days in 1959 gave significant yield reductions. Some significant yield reductions resulted when fewer leaves were removed, but these results were not consistent.
Effects of Physiological Quality of Seeds on Total Germination, Rapidity of Germination, and Seedling Vigor1
Authors: Webster Lionel V. , Dexter S. T.
Published: July 2010

Synopsis

Seeds of barley, wheat, beans and corn were mistreated with mechanical abuse, with high temperatures, or with storage at high relative humidity. Percentage germination, rapidity of germination and size of seedlings were determined. It is suggested that the quality of seeds might be determined by consideration of which one of these qualities first shows deterioration.
Corn Yield Response to Applied Phosphorus as Affected by Rainfall and Temperature Variables1
Authors: Engelstad O. P. , Doll E. C.
Published: July 2010

Synopsis

June plus July rainfall accounted for 75% of the variation in maximum yields of corn with increasing rates of applied P over a 12‐year period at Greenville, Ky. While the level of net return was strongly dependent upon June plus July rainfall, the actual yield responses to applied P and the optimum application rates of P were largely independent of the above rainfall variable.
Cotton Fruiting as Affected by Soil Moisture Regime1
Authors: Bruce R. R. , Shipp C. D.
Published: July 2010

Synopsis

Fruit production of cotton plants grown in plots maintained within 0.16 to 0.33 atmosphere mean soil moisture tension range until 6 weeks past first bloom followed by 2 weeks in the range 0.34 to 0.50 atmosphere was not significantly lower than that of plants grown at the low tension throughout. Maintaining the higher mean soil moisture tension throughout the 8 weeks past first bloom significantly reduced cotton fruiting but increased the lint production per inch of applied water.
Effect of Duration and Timing of Low Soil Oxygen Content on Shoot and Root Growth
Authors: Letey J. , Stolzy L. H. , Blank G. B.
Published: July 2010

Synopsis

Shoot growth was critically damaged when soil containers were placed in nitrogen at early stages of growth before roots became well established. Root growth essentially ceased when placed in the nitrogen atmosphere and there was a time lag in recovery when placed in a “normal” atmosphere. All species studied, cotton, sunflower, and green beans, showed similar results.
Effects of Heating and Storage on the Viability of Grass Seed Harvested with High Moisture Content1
Authors: DeWitt J. L. , Canode C. L. , Patterson J. K.
Published: July 2010

Synopsis

Seed harvested by the windrow method germinated the same regardless of moisture levels at harvest and was consistently superior in germination to that of direct‐combined seed. Seed combined at less than 25% moisture did not heat appreciably in storage and there was no loss in germination as a result of immediate heating. Delta Kentucky bluegrass seed harvested at more than 22% moisture and Manchar smooth bromegrass seed harvested at more than 24% moisture had a lower germination when stored in bags for 2 weeks after harvest.
Effectiveness of Inorganic Nitrogen as a Replacement for Legumes Grown in Association with Forage Grasses. I. Dry Matter Production and Botanical Composition1
Authors: Carter Lark P. , Scholl J. M.
Published: July 2010

Synopsis

Yields of orchardgrass and bromegrass were increased significantly by each increment of nitrogen with 0, 30, 60, 120, and 240 pounds per acre rates. Orchardgrass tended to outyield bromegrass at higher N rates. Application of N to grass‐legume mixtures resulted in increased yield of dry matter due to increased growth of the grass component.
Response of Four Pasture Grasses to Nitrogen in the Dry Tropics1
Authors: Oakes A. J. , Skov O.
Published: July 2010

Synopsis

Yields of Coastal bermudagrass, rhodesgrass, pangolagrass, and stargrass increased markedly following split applications of nitrogen at rates up to 300 pounds of N per acre annually. The recovery and efficiency with which the applied nitrogen was utilized varied with grass species and nitrogen level. Ranked in descending order of yield and efficiency of nitrogen utilization in forage production the grasses are: rhodesgrass, Coastal bermudagrass, stargrass, and pangolagrass.
Root Weight and Distribution of Blue Panicgrass, Panicum antidotale Retz., as Affected by Fertilizers, Cutting Height, and Soil‐Moisture Stress1
Authors: Wright Neal
Published: July 2010

Synopsis

Root distribution by weight to a depth of 12 feet showed 70% of the roots in the top 2 feet. A significant root weight increase resulted from nitrogen fertilizer with maximum response at the 525‐pound level. Root weights were significantly increased when 525 pounds of P was applied with 175 pounds of N. No further increase occurred when N was increased to 875 pounds per acre. Other treatments and interactions were nonsignificant (P, K, NK, and PK),. Root weights were significantly reduced with lower clipping heights and lower soil‐moisture‐stress depths. Responses to clipping height and soil moisture were linear.
Cloddy and Conventional Seedbeds for Wheat Production in the Northwest1
Authors: Horning T. R. , Oveson M. M.
Published: July 2010

Synopsis

Winter wheat seeded in multiple‐ and single‐tilled seedbeds produced comparable yields over a 6‐year period. The annual cost of from 2 to 4 additional tillage operations required to prepare finely worked seedbeds varied from $2.00 to $4.50 and averaged $2.88 per acre.
Influence of Rate and Method of Planting on Several Components of Irrigated Corn Yields1
Authors: Colville W. L.
Published: July 2010

Synopsis

The ratio of ears produced to mature plants was the major contributor to increased yields which resulted from drilled over hill‐dropped and checked corn grown under irrigated conditions in Nebraska. Although this ratio decreased with increasing population, the greater number of ears per acre accounts for much of the grain yield increase when planting rates were increased. Components of yield were linearly correlated with population but not with yield due to the curvilinear relationship of yield to population.
Some Effects of Nitrogen Fertilizer, Maturity, and Light on the Composition of Orchardgrass1
Authors: Gordon C. H. , Decker A. M. , Wiseman H. G.
Published: July 2010

Synopsis

Nitrogen‐fertilized orchardgrass forage contained more crude protein, nitrate, and water than control forage. The effects were less marked with advancing maturity but continued through the seed stage. Fertilized forage contained less sugar previous to flowering. Composition changes were greater when fertilized plants were shaded. The highest mean nitrate level observed was 2.4%.
Sodic Tolerance of Tall Wheatgrass1
Authors: Carter David L. , Peterson H. B.
Published: July 2010

Synopsis

Tall wheatgrass grew and produced well at ESP (exchangeable‐sodium‐percentage) levels between 50 and 60 under field conditions. In the greenhouse, tall wheatgrass germinated and produced at ESP levels of 60, with transplants exhibiting superior performance. Seeds germinated with no adverse effects at pH levels up to 9.7. Plants grew at pH levels of 10.0 in solution culture.
Investigations of Ammonium Chloride as a Fertilizer for Forage Crops and Corn1
Authors: McClure George W. , Hunter Albert S.
Published: July 2010

Synopsis

At low to moderate rates of nitrogen, crop yield increases from ammonium chloride compared well with those from ammonium sulfate. When high rates of nitrogen as ammonium chloride were broadcast on growing grass, some damage to stand resulted. At high rates, and especially when in contact with plant leaves, chloride was more toxic to timothy than sulfate was. Most of the chloride applied to well‐drained soils was lost by leaching within one year.
Increased Winter Hardiness in Oats Now Available1
Authors: Coffman Franklin A.
Published: July 2010

Synopsis

Several newly released oat varieties are sufficiently hardy for the areas in which they have been released, but none can be considered to possess a final or ultimate level of winter hardiness.
Sugar Beet Yields on Fallowed and Nonfallowed Land on Two Soil Types
Authors: Hedlin R. A. , Schreiber K.
Published: July 2010

Synopsis

Fallowing resulted in increased nitrate nitrogen but did not influence stored moisture. The increase in nitrate nitrogen obtained by fallowing resulted in a decrease in response to applied nitrogen.
Methods of Crop Response Studies (Emphasis on Thermal Effects)1
Authors: Wang J. Y.
Published: July 2010

Synopsis

Sorting devices, both single and multiple, a crop thermal response model, and a hythergraph are used to illustrate temperature as a measure of crop environments. Emphasis is placed upon methodology. Methods of analysis and of synthesis are discussed.
Effect of Amino Acids on Germination of Red Clover Seeds1
Authors: Kendall W. A.
Published: July 2010

Synopsis

Significant differences among 18 seed lots of red clover were calculated from the number of seeds which germinated on each of six amino acids. The differences, however, were not sufficiently consistent to be useful for identification purposes.
An Evaluation of Losses Caused by Hessian Fly in a Wheat Fertilizer Experiment1
Authors: Okigbo Bede N.
Published: July 2010

Synopsis

Losses attributed to hessian fly in wheat grown at 3 levels of nitrogen in the presence or absence of 2 levels of phosphorus and potassium were evaluated. Infestation and losses due to hessian fly were highest at the highest levels of nitrogen.
Influence of Certain Forage Grasses on the Yield of the Following Crop1
Authors: White G. A. , Schmid A. R.
Published: July 2010

Synopsis

Previous grasses had no effect on grain yields of corn and oats, but N fertility was a factor. No toxic or yield effect was observed after incorporating grasses or the extracts of their autoclaved roots into the soil.
Crownvetch for Highway Bank Stabilization in the Piedmont Uplands of Georgia1
Authors: Richardson E. C. , Diseker E. G. , Hendrickson B. H.
Published: July 2010

Synopsis

Crownvetch was established on highway cut slopes in the Piedmont Uplands of Georgia by seedings and transplantings made in the fall and early spring. Either mulch or a nurse crop on all slope and soil conditions was usually required to protect the seedlings in their early stages. Best protection was obtained when crownvetch was seeded in combination with Abruzzi rye as a nurse crop.
Yield, Percent Nitrogen, and Total Nitrogen Uptake of Various California Annual Grassland Species Fertilized with Increasing Rates of Nitrogen1
Authors: Jones Milton B.
Published: July 2010

Synopsis

Near maximum yields resulted where 80 pounds N per acre were applied, but carryover was measurable only where 160 pounds were used. In nonleguminous plants, percent N increased with N rates during the vegetative stage, but at maturity it was less where 40 pounds N were applied than in the control. N uptake increased with N rate during winter, but uptake on unfertilized plots during the spring approximated that on plots receiving 40 pounds of N.
Effect of Liming and Potassium Fertilization on the Yield and Composition of an Alfalfa‐Orchardgrass Association1
Authors: MacLeod L. B. , Bradfield Richard
Published: July 2010

Synopsis

Liming increased the dry matter yields of oats and of an alfalfa‐orchardgrass mixture. Response to K increased with increased base saturation of the soil, and survival of alfalfa plants on soil limed to pH 5.5 or higher was largely dependent on K supply. Alfalfa was the dominant species where there was sufficient K for both components and orchardgrass dominated where K was limited. Total available carbohydrates in the storage organs of each species increased with K fertilization.
Effect of Soil Temperature and Soil Moisture on the Physiology of Sorghum1
Authors: Stoffer Ronald V. , Van Riper Gordon E.
Published: July 2010

Synopsis

Soil temperature and soil moisture may be better criteria than a specific calendar date for determining the time to plant grain sorghum to obtain optimum emergence and growth.
Some Effects of Emulsified Hexa‐Octadecanol on Germination, Establishment, and Growth of Kentucky Bluegrass
Authors: Atsatt P. R. , Bliss L. C.
Published: July 2010

Synopsis

Germination was reduced by treatment of seed but increased by treatment of soil surface to maintain high soil moisture content. In the field, 450 pounds per acre of the emulsion gave greatest increases in germination, percent cover, and dry weight yields.
Effects of Oats‐Rape Interseeding and Lamb‐Grazing on Corn Yield1
Authors: Marten G. C. , Jordan R. M. , Fedin W. F.
Published: July 2010

Synopsis

Early‐summer interseeding of an oats‐rape mixture in corn followed by mid‐summer to fall pasturing with lambs generally caused a loss in corn yield during 1960 to 1962. Lamb gains were variable, and usually not sufficient to offset corn yield losses. Under ideal corn‐growing conditions and with a 43‐day grazing period (July 20 to September 1), corn yields were not adversely affected by the interplanted crop or the grazing lambs in 1961. Corn yields and lamb gains generally decreased when grazing continued after early September.
Phosphorus Uptake by Plants and Readily Extractable Phosphorus in Soils1
Authors: Blanchar R. W. , Caldwell A. C.
Published: July 2010

Synopsis

Phosphorus uptake from calcareous and noncalcareous soils was correlated with available P as determined by five methods. With calcareous soils all of the methods except the 1‐to‐10 Bray No. 1 were suitable for estimating available P. With noncalcareous soils the best correlations between uptake and available P were obtained using the Morgan and water solubility methods. Relationships between available P and soil properties such as amount and kind of carbonates in calcareous soils and forms of P were examined.
Influence of Nitrogen on Seasonal Production of Dry‐Matter and Nitrogen Accumulation From Meadows1
Authors: Rumburg C. B. , Wallace Joe D. , Raleigh R. J.
Published: July 2010

Synopsis

Difference in dry‐matter yields among plots given different levels of N fertilizer gradually increased to a maximum at time of maximum yield. The time of maximum yield occurred later in the growing season on plots fertilized with N than on unfertilized plots. During early stages of growth the internal concentration of N in herbage increased with each increment of applied N. The rate of dilution of internal N increased with increasing levels of applied N.
Evaluation of Short Stature Winter Wheats (Triticum aestivum L.) for Production under Texas Conditions1
Authors: Porter K. B. , Atkins I. M. , Gilmore Earl C. , Lahr Keith A. , Scottino Paschal
Published: July 2010

Synopsis

Short stature winter wheats yielded more than taller commercial varieties in irrigated trials and on dryland in a 35‐inch rainfall area but about the same or less on dryland in areas having 25 and 20 inches of annual rainfall. One short wheat strain responded the same as the taller variety, ‘Concho’, to differences in row spacing and planting rate but gave a greater yield response to a high rate of applied nitrogen. Quality characteristics were not associated with plant height.
Interrelationship of European Corn Borer, Plant Populations, Nitrogen Levels, and Hybrids on Stalk Quality of Corn1
Authors: Zuber M. S. , Dicke F. F.
Published: July 2010

Synopsis

Crushing strength of a 2‐inch mature stalk section was shown to be a suitable method of determining stalk damage by the European corn borer.
Pre‐emergence, Preplanting and Postemergence Herbicides for Alfalfa and Birdsfoot Trefoil1
Authors: Peters Elroy J.
Published: July 2010

Synopsis

Herbicides reduced yields of weeds and increased yields of alfalfa and birdsfoot trefoil during the seedling year. EPTC did not control broadleaved weeds as well as neburon or 4‐(2,4‐DB), but EPTC was superior to neburon for weed‐grass control. General weed control was obtained with neburon and with 4‐(2,4‐DB) in combination with dalapon or EPTC. None of the herbicide injured legumes to any extent.
Effect of Exchangeable Sodium Percentage on the Growth and Absorption of Essential Nutrients and Sodium by Five Crop Plants1
Authors: Bains S. S. , Fireman Milton
Published: July 2010

Synopsis

Greenhouse experiments indicate that sorghum is a good crop for studying exchangeable sodium‐fertility interrelationships. For the five crops studied, exchangeable sodium generally caused an increase in the absorption of sodium, nitrogen, and molybdenum, and a decrease in the absorption of calcium, potassium, sulfur, manganese, copper, zinc, boron, and chlorine.
Row Width and Plant Population Studies With Corn1
Authors: Stickler F. C.
Published: July 2010

Synopsis

Twenty‐inch rows exceeded 40‐inch rows in yield by 6% under irrigation and by 5% without irrigation. This yield superiority was associated mainly with more 2‐eared and fewer barren plants.
Tolerance of Five Turfgrass Species to Soil Alkali1
Authors: Lunt O. R. , Kaempffe C. , Younger V. B.
Published: July 2010

Synopsis

The growth of Puccinellia distans, Seaside bentgrass, Alta fescue, Kentucky bluegrass, and common bermudagrass as influenced by exchangeable sodium percentage in soils was studied using both untreated and VAMA treated soils. Puccinellia distans and Seaside bentgrass exhibited good tolerance and only moderate reduction in growth at ESP values of 26 to 28. The other grasses were reduced in growth by about one‐third to one‐half in this range but showed only slight reduction in growth at ESP values of 11 or 12.
Exponential Regression and a Computer Program for the Estimation of Parameters1
Authors: Carmer S. G.
Published: July 2010

Synopsis

Examples of exponential regression models of agronomic importance are described. An iterative least squares procedure for the fitting of exponential models is outlined. An IBM 7094 computer program useful for a wide range of exponential models with 1 to 7 independent variables is described.
Effect of Depth of Water Table on Yield of Tall Fescue1
Authors: Williamson R. E. , Willey C. R.
Published: July 2010

Synopsis

Without surface watering, tall fescue yielded approximately the same with water table depths of 9 and 17 inches. With 1 inch of surface water per week, the maximum yield was obtained with a 16‐inch water table depth. The reduction in yield with the 8‐inch water table depth was attributed to leaching nitrogen from the root zone. Aeration measurements in the root zone offer a means of extrapolating desired water table depths to other soil types.
Yield, Nitrogen Content, and Water Use of Sart Sorghum1
Authors: Doss B. D. , Ashley D. A. , Bennett O. L. , Patterson R. M. , Ensminger L. E.
Published: July 2010

Synopsis

Forage yields of Sart sorghum were increased by either nitrogen fertilizer or irrigation, but a far greater increase was obtained when both were used. Nitrogen content of the plants increased as soil moisture decreased and rate of nitrogen application increased. Closer row spacing increased both forage yield and nitrogen content. Water use increased as the amount of available soil moisture increased.
Turfgrass Response to Dacthal and Nitrogen1
Authors: Jagschitz J. A. , Skogley C. R.
Published: July 2010

Synopsis

Applications of Dacthal for crabgrass control in a turfgrass mixture resulted in a large reduction in the amount of red fescue, some Colonial bentgrass reduction and an increase in Kentucky bluegrass. Dacthal initially reduced total turfgrass cover but when used with monthly nitrogen applications reduction in cover was less apparent. Nitrogen increased the amount of bentgrass, reduced red fescue, and had little effect on bluegrass. Turfgrass treated with nitrogen had a darker green color and yielded more clippings.
Performance of Tillage Implements in a Stubble Mulch System. I. Residue Conservation1
Authors: Woodruff N. P. , Fenster C. R. , Chepil W. S. , Siddoway F. H.
Published: July 2010

Synopsis

During initial tillage of winter wheat stubble, the amount of crop residue retained on the soil surface by a given implement varied with height of stubble, amount of pretillage residue, and spacing between stubble rows. During subsequent tillage, the amount of residue retained on the surface was very slightly affected by height or length of residue, moderately affected by amount of pretillage residue, but strongly influenced by previous method of tillage.
Effects of Irrigation and Phosphorus on Production of Field Tomatoes1
Authors: Cannell Glen H. , Bingham F. T. , Asbell C. W.
Published: July 2010

Synopsis

In irrigation‐phosphorus studies the highest fruit yields were associated with a medium moisture treatment and adequate phosphorus. Fruit size, rot, and set were significantly affected by soil moisture treatments but were not significantly influenced by P levels.
Response of Wet‐Meadow Vegetation to Length and Depth of Surface Water from Wild‐Flood Irrigation1
Authors: Rumburg C. B. , Sawyer W. A.
Published: July 2010

Synopsis

Hay yields from native wet meadows increased with an increase in the length of continuous wild‐flood irrigation, as long as the water was 5 inches or less above the soil surface. Water levels of 7.5 inches above the surface were detrimental to yields if they persisted 50 days or longer. Delaying irrigation 2 weeks at the beginning of the season and extending it 2 weeks at the end increased yields by .25 ton/acre.
Influence of Soil Aeration on the Growth and Chemical Composition of Three Grass Species1
Authors: Waddington D. V. , Baker J. H.
Published: July 2010

Synopsis

Three grass species were grown in soil in which oxygen diffusion rates were varied by changing soil moisture tension and oxygen concentration. Root growth of Merion Kentucky bluegrass was greatly reduced or stopped in soil where oxygen diffusion rates were less than 5 to 9 × 1O−8g./cm.2/min. Penncross creeping bentgrass and goosegrass roots grew well at rates below 5 ✕ 10−8 g./cm.2Vmin. Nutrient accumulation was not appreciably decreased at low oxygen diffusion treatments.
Use of a Uniformity Trial in Grazing Experiments1
Authors: Gross H. D. , Goode Lemuel , Petersen R. G.
Published: July 2010

Synopsis

Covariance analysis served to increase the precision with which some grazing trial criteria were estimated. The magnitude of the increase decreased sharply with increasing time intervals.
The Growth and Yield of Corn. IV. Environmental Effects on Grain Yield Components of Mature Ears1
Authors: Hatfield A. L. , Benoit G. R. , Ragland J. L.
Published: July 2010

Synopsis

Corn was grown in 6 environmental combinations in each of 2 years. Grain yield was related to emergence date and to total hours of daylight during the grain formation period. The correlation of ear components with yield and with themselves was drastically affected by environmental factors associated with season of growth and soil moisture. The variations in the numerical values due to environmental changes suggest that ear component analysis in a suboptimum environment is of little value for determining genetic inheritance.
Seasonal Variation in Chemical Composition and Yield of Coastal Bermudagrass as Affected by Nitrogen Fertilization Schedule1
Authors: Hart Richard H. , Burton Glenn W. , Jackson J. E.
Published: July 2010

Synopsis

Seasonal variation in yield and crude protein content of ‘Coastal’ bermudagrass was reduced when nitrogen was applied in 6 increments of 100 pounds per acre rather than three 200‐pound increments. Protein content at the first cutting was higher under the latter schedule, but was higher under the former at the second cutting. Total yield, average crude protein, crude fiber, and vitamin A content, and seasonal variation in fiber and vitamin A content did not differ significantly between schedules. A schedule of four 150‐pound applications of nitrogen is proposed to maintain protein, fiber, and vitamin A at desired levels throughout the season.
The Effect of Nitrogen Fertilization of Mature Pangolagrass Just Prior to Utilization in the Winter on Yields, Dry Matter, and Crude Protein Contents1
Authors: Kretschmer Albert E.
Published: July 2010

Synopsis

A new technique to increase crude protein levels of pangolagrass was studied. Average crude protein contents of mature pangolagrass were increased from 4.5 to 9.2 and to 12.3% when 45 and 90 pounds of N per acre were applied, respectively, about 4 weeks prior to clipping in January. The amount of increase depended upon the rate of N applied and the amount of grass present when fertilized. The N application had little effect on January grass yields. Different late summer and fall dates and rates of fertilizer, however, markedly affected winter yields but had only slight influence on winter crude protein levels.