bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Measurement of the Contributions of Ten Species to Pasture Mixtures1
Authors: Jackobs J. A. 
Published: July 2010

SynopsisAlfalfa and orchardgrass had the greatest influence on production of pasture seeding mixtures. Ladino clover fluctuated widely due to winterkilling and reseeding. Smooth bromegrass, perennial ryegrass, red clover, alsike clover, and birdsfoot trefoil declined after the first year of production. Initial stands of tall fescue and timothy were not adequate to evaluate these species. After disappearance of a shortlived species from a mixture, there was only temporary reduction in yield if either alfalfa or orchardgrass was present.
Sweet Corn Production as Affected by Moisture and Nitrogen Variables1
Authors: Stanberry C. O. , Schreiber H. A. , Lowrey M. , Jenson C. L. 
Published: July 2010

SynopsisMoisture and nitrogen variables influenced sweet corn production at various growth stages‐seedling establishment, internode elongation, and pollination and grain development in a 3‐year investigation. Components contributing directly to yield were plant population, ears per plant, and weight per ear (including rows of kernels per ear, kernels per row, and weight per kernel). All were affected by irrigation and/or N fertilization.
Availability of Fertilizer Phosphorus in Three Latosols of Hawaii1
Authors: DeDatta S. K. , Fox R. L. , Sherman G. Donald 
Published: July 2010

SynopsisThese soils immobilized 98 to 99.8% of added P. In 2 acid soils, liming to pH 5.5 reduced the extractable aluminum by more than half. The amount of added P that remained in solution after 1 hour equilibration increased progressively when the pH was adjusted to 5.8 in one of these soils and to 6.6 in the other. Evidence indicated that sudangrass seedlings, grown in vermiculite, lost P when the root system was placed in contact with soils having high fixation capacity.
Effects of City Sewage Effluent on Grain Yield and Grain and Malt Quality of Fall‐Sown, Irrigated Barley1
Authors: Day A. D. , Dickson A. D. , Tucker T. C. 
Published: July 2010

SynopsisIn general, the application of sewage effluent to barley resulted in an increase in grain yield, percentage of nitrogen, and malt diastatic power, but kernel weight, kernel size, and malt extract percentage were decreased.
Toxicity to Garden Peas of Certain Finely‐Ground Woods and Barks Mixed with Soil1
Authors: Allison F. E. , DeMar W. H. , Smith J. H. 
Published: July 2010

SynopsisTwenty‐two of 28 woods and barks studied produced no significant toxicity, 4 of either the woods or barks caused slight inhibition of growth, and 2 (California incense cedar wood and white pine bark) were very injurious.
Response of Several Crops to Ammonium and Nitrate Forms of Nitrogen as Influenced by Soil Fumigation and Liming1
Authors: Morris H. D. , Giddens Joel 
Published: July 2010

SynopsisA differential response to N source was found among the six crops on fumigated soil when plant weight was used as the criterion. Plant height and percent total N in the plant were found to be unsatisfactory criteria for evaluating the efficiency of N sources.
Soil Water Depletion by Irrigated Cotton as Influenced by Water Regime and Stage of Plant Development1
Authors: Amemiya M. , Namken L. N. , Gerard C. J. 
Published: July 2010

SynopsisThe period of peak soil water depletion occurred at early bloom. High soil water extended this peak period and increased the rate and amount of water depletion. Although cotton plants may extract water from depths below their primary root zone, the rate of water extraction from these depths may not be sufficient to maintain optimum plant growth during periods of peak demand.
Relationship Between NO3‐N Production, Dry‐Matter Production and N Responses on Coastal Plain Soils1
Authors: Welch C. D. , Bartholomew W. V. 
Published: July 2010

SynopsisNitrate‐N production appeared to give a better estimate of the availability of soil N than Kjeldahl N or organic matter. Higher correlation coefficients were obtained for data from well‐drained than from poorly drained soils. Comparisons between results for organic matter or Kjeldahl N and corn yield responses from N applications under field conditions were not significant.
Effect of Irrigation and Rate and Time of Nitrogen Application on Temporary Winter Grazing1
Authors: Craigmiles J. P. , Crowder L. V. 
Published: July 2010

SynopsisForage yields were not significantly affected by the method of applying N. Irrigation increased production and the stand of crimson clover. The clover stand was reduced or eliminated by N applications of 32 pounds per acre or more. Production increased with each increment of N up to 256 pounds on the nonirrigated plots and up to 128 pounds on irrigated plots. Winter killing occurred on irrigated plots where 150 pounds of N were applied.
Value of Pelleted Fescue, Browntop Millet, and Whole Stalk Corn as Steer Feed1
Authors: Beaty E. R. , Hayes D. D. , Worley Edward E. 
Published: July 2010

SynopsisWhen pelleted whole‐stalk corn and fescue were fed to growing steers, feed intake and gains were not different from those of steers fed ground snapped corn. Pelleted browntop millet was consumed at the same rate but gains were reduced.
Mineral Composition of Gluten, Starch and Water‐Soluble Fractions of Wheat Flour and Its Relationship to Flour Quality1
Authors: Bequette R. K. , Watson C. A. , Miller B. S. , Johnson J. A. , Schrenk W. G. 
Published: July 2010

SynopsisElemental composition of the flour fractions was affected by location and by variety. Total ash and the 7 elements studied were distributed quite differently among the 3 flour fractions. The significant relationships obtained between elemental composition of the flour fractions and baking quality indicate that mineral uptake by the wheat plant is an important factor in flour quality, although the data presented do not warrant conclusions regarding the exact mechanisms involved.
Cotton Response to Fertilization on Two Soils Differing in Salinity1
Authors: Amer Fathi , Elgabaly M. M. , Balba Monem A. 
Published: July 2010

SynopsisCotton responded only to N, due to the presence of adequate levels of P and K in the soil. The degree of response and N recovery by the crop were greater for the nonsaline soil than for the salt‐affected soil.
Radioactive Isotope Demonstration for Improved Teaching of Soil Chemistry1
Authors: Himes F. L. 
Published: July 2010

SynopsisThe use of Sr90 to demonstrate cation exchange reactions has been effective in increasing the interest of beginning soil students in soil chemistry and in the adsorption of cations by soil. The demonstration is used as a basis to explain many of the observations made since radioactive fallout has occurred. Also, the demonstration is used to illustrate the removal of radioactive materials from solutions by ion exchange.
Effect of the Amount of Water Applied as a Single Irrigation on Cotton Grown Under Dryland Conditions1
Authors: Marani A. , Fuchs Y. 
Published: July 2010

SynopsisThe optimum amount of water, applied as a single irrigation to cotton ‘Pima 32’ variety at the beginning of flowering, was that needed to wet the soil to a depth of approximately 90 cm. A higher amount of water, though inducing more vegetative growth and flowering, did not produce lint yield, boll size, or number of harvested bolls exceeding this optimum treatment. An amount of water less than the optimum was less effective.
Effectiveness of Inorganic Nitrogen as a Replacement for Legumes Grown in Association with Forage Grasses. II. Nitrogen Content, Yield of Nitrogen, and Seasonal Distribution1
Authors: Carter Lark P. , Scholl J. M. 
Published: July 2010

SynopsisPercent N and seasonal yield of N in pure orchardgrass and bromegrass stands were increased significantly by each increment of fertilizer N with 0, 30, 60, 120, and 240 pound‐per‐acre rates. Split applications of 120 pounds of N did not result in significant seasonal N yield increases. Application of fertilizer N to grass‐legume mixtures resulted in increased yields of N and consistently increased the percent N in th grass component in the first harvest.
Field Plot Technique Studies with Flue‐Cured Tobacco. II. Experimental Designs and Replications1
Authors: Crews Julian W. , Jones Guy L. , Mason D. D. 
Published: July 2010

SynopsisSimple and triple lattice designs were 4 and 5% more efficient than randomized complete block designs at Rocky Mount, and 54 and 60% more efficient at Rural Hall for yield as determined from uniformity data. Precision was increased with a 7 × 7 triple lattice for all characters studied at 6 locations during 3 years. Expected LSD for yield from 4 replications of the optimum (27 plants) and plots 2 rows by 20 plants was 4.9 and 4.4% of the mean, respectively, at Rocky Mount and 7.9 and 7.5% at Rural Hall.
Seed and Forage Production of Irrigated Russian Wildrye as Influenced by Time and Rate of Nitrogen Fertilization1
Authors: Rogler George A. , Lorenz Russell J. 
Published: July 2010

SynopsisSignificant increases in seed and forage aftermath yields of Russian wildrye were obtained from annual applications of 50, 100, and 200 pounds of N per acre. Average yields of both seed and forage were increased by each added increment of N. As stands became older the application of N sustained both seed and forage yields at a much higher level than no N. There were no significant differences in seed and forage yields between single and split applications of N and no yield response to P.
Effect of Soil Water Content on the Growth of Adventitious Roots of Sunflower1
Authors: Stevenson D. S. , Boersma L. 
Published: July 2010

SynopsisRoot growth was not dependent upon the water content of a sandy loam, but was markedly increased by increased initial water contents in a clay loam. The relationship was slightly curvilinear. Root growth as a result of water content or soil moisture suction treatments should be accounted for whenever the effects of water supply on absorption processes are under investigation. A technique involving the growth of adventitious roots was used.
Distribution of C14 Among Metabolites of Flooded and Aerobically Grown Tomato Plants1
Authors: Fulton J. M. , Erickson A. E. , Tolbert N. E. 
Published: July 2010

SynopsisThe distribution of photosynthetically fixed C14O2 among 14 metabolites of tomato plants (watered normally) was compared with th t from plants which were flooded. The flooding treatments produced marked changes in the percent of C14 label found as glucose, fructose, sucrose, malic acid, citric acid, gamma amino butyric acid, and the lipid fraction.
Studies with Sudangrass. II. Nutritive Evaluation by In Vivo and In Vitro Methods1
Authors: Reid R. L. , Clark B. , Jung G. A. 
Published: July 2010

SynopsisDigestibility and intake data were determined on chopped, green sudangrass fed at various stages of maturity to sheep. Feeding value, as expressed by a calculated Nutritive Value Index, was found to decrease markedly with growth stage; higher levels of nitrogen fertilization had little effect on intake or dry matter digestibility, but increased protein digestibility. In vitro indices of cellulose digestibility and gas production were found to be highly correlated with the animal criteria of digestibility, intake, and N.V.
Influence of Oxygen and Carbon Dioxide on Germination and Seedling Development of Corn (Zea mays L.)1
Authors: Unger Paul W. , Danielson Robert E. 
Published: July 2010

SynopsisCorn seeds were germinated and the seedlings permitted to develop on wet filter paper in sealed containers at various pressures of oxygen or mixtures of oxygen and carbon dioxide. The seeds germinated over a wide range of oxygen pressures, but further radicle elongation was inhibited by 0.0‐ and 150.0‐cm. Hg oxygen pressure. Maximum radicle growth occurred at 20.0 cm. pressure. Sharp reductions in growth were noted for oxygen pressures less than 20.0 cm. Radicle growth in mixtures of oxygen and carbon dioxide was significantly greater than growth in oxygen alone.
Seasonal Response of Temporary Winter Grazing Mixtures to Split Applications of Nitrogen1
Authors: Cummins D. G. , Craigmiles J. P. , Newton J. P. 
Published: July 2010

SynopsisForage yields of nonirrigated oat mixtures and both irrigated and nonirrigated rye mixtures were increased by split applications of N compared to applying all the N at planting time. Irrigated oats did not respond to split N applications. Split applications of N increased late season forage production with little effect on fall production when compared with applying all the N at planting. Rye appears to be more responsive to split N applications than oats. Forage yields of oat and rye mixtures were increased by increasing N rates and by irrigation.
Effect of Submersion in Water on Tall Fescue, Orchardgrass, and Ladino Clover1
Authors: Gilbert W. B. , Chamblee D. S. 
Published: July 2010

SynopsisThe influence of submersion in water for various intervals at 65° F. and 90° F. on the growth and survival of seedling and mature plants was determined. Tall fescue was more tolerant of flooding than orchardgrass and ladino clover. Seedling and mature plants of orchardgrass and ladino clover were materially damaged by flooding at 90° F. for periods of 2 to 6 days; whereas much less damage was realized at the lower temperature.
Effect of Plant Density and Moisture Supply on the Forage Quality of Sudangrass (Sorghum sudanense (Piper) Staph)1
Authors: Koller H. R. , Clark N. A. 
Published: July 2010

SynopsisUnder a pasture management system, quality of sudangrass forage at the initial harvest decreased as plant population increased. At the second harvest, forage quality improved as plant density increased. Moisture supply did not significantly affect forage quality at either harvest.
Reaction of Peanuts to Dry and Wet Growing Periods in Brazil1
Authors: Wessling W. H. 
Published: July 2010

AbstractReactions of Spanish‐Valencia, Virginia bunch, and runner peanut varieties and strains to wet and dry growing periods were studied during three growing seasons, 1959 to 1962, in the western part of the State of Sao Paulo, Brazil.During the three wet seasons Spanish—Valencia peanuts made better use of excess moisture at high temperatures than did the other two groups. Virginia bunch and runner varieties and strains reacted similarly and rather uniformly within each group during these three growing periods. Excess moisture influenced the development of these two groups negatively.During the dry seasons the productivity of Spanish‐Valencia peanuts was below that of the other two groups when the planting date was early enough to avoid extreme conditions.The Virginia bunch peanuts maintained their wet‐season growing pattern in the dry seasons of 1960 and 1961 with a slight yield advantage for the dry season crops. This peanut group was less affected by either moisture or temperature unless very low rainfall and temperatures exceeded the adaptability of this group. This was demonstrated by experiments made during the dry season of 1962.The runner peanuts fell into two groups on the basis of the dry season experiments, one group reacting like Spanish—Valencia peanuts, the other like Virginia bunch peanuts. Genetical background and a higher sensitivity to temperature differences were suggested as the main causes for this reaction pattern.
Influence of Soil Texture and Rainfall on the Response of Cotton to Moisture Regime1
Authors: Gerard C. J. , Namken L. N. 
Published: July 2010

AbstractIrrigation studies indicate that the water management requirement of cotton is dependent upon soil texture and related rooting characteristics of the plants. Cotton on medium‐textured soils develops an extensive root system which is able to extract water to depths of 4 to 5 feet (2). Moisture depletion patterns on fine‐textured soils indicate that soil moisture extraction is largely restricted to the surface 2 feet.Cotton on the medium‐textured soils needs only 1 or 2 irrigations, depending on rainfall, to produce satisfactory yields. Cotton on the fine‐textured soils should be irrigated every 10 to 15 days, with the first irrigation applied at the first bloom; 4 to 6 light irrigations during blooming and fruiting period are required to produce satisfactory yields.Summer rainfall often supplies sufficient water to produce 80 to 90% of the yield potential on medium‐textured soils but only 50% of yield potential on fine‐textured soils. Lack of sufficient absorbing roots prevents cotton from extracting sufficient water during peak demand period from depths below its primary root zone (0 to 3 feet) on medium‐textured soil. Extraction of water from below its primary root zone (top foot) is insufficient to prevent reduction in growth and yield of cotton grown on fine‐textured soil.
Regrowth Potential of Coastal Bermudagrass as Related to Previous Nitrogen Fertilization1
Authors: Adegbola Anthony A. , McKell Cyrus M. 
Published: July 2010

AbstractThis study evaluated the regrowth potential of Coastal bermudagrass differentially fertilized during a previous season with 0, 250, 500, 750, 1000, and 1250 pounds N per acre in 5 equal increments, respectively. Six‐inch diameter dormant sod plugs were taken from each plot, potted, and placed in a dark chamber. Leaf growth was measured in weight of dry matter produced per sod plug. Carbohydrate reserves in stubble and rhizomes were determined by chemical analysis.Regrowth after 6 weeks was closely related to the content of carbohydrate reserve present in the stubble and rhizome. Overall regrowth (18 weeks) mainly reflected the result of the first 6‐week growth period and suggested that 6 weeks were adequate for this test. Sod plugs from plots fertilized at 500 pounds N per acre made the best regrowth. Least regrowth was made by sod plugs from plots fertilized at 750 pounds N per acre.
Effect of Row Spacing, Plant Population, and Nitrogen Fertilization on Dryland Grain Sorghum Production1
Authors: Welch Norman H. , Burnett Earl , Eck H. V. 
Published: July 2010

AbstractPopulation, N fertilization, and row spacing of grain sorghum were studied on Springer loamy fine sand. In the presence of adequate N, production of grain and residue increased with increasing populations. Optimum populations for both grain and residue production were between 40,000 and 60,000 plants per acre.Maximum yields of grain and residue were obtained with 50 pounds of N, except under above‐average moisture conditions and high plant populations. At populations of 40,000 plants per acre, grain and residue yields in 20‐inch rows equaled or exceeded those in 40‐inch rows. Increased yields with increasing populations and N rates resulted from increased water‐use efficiency rather than from an increase in the amount of water used.Plant populations had little effect on grain residue ratios. Ratios decreased with increasing N rates in one season and increased with increasing N rates in the following season.Nitrogen content of grain and recovery of applied N in grain indicate low efficiency of applied N.The results of this study indicate that grain sorghum, grown continuously, can produce sufficient residue to provide satisfactory wind erosion control on the easily erodible soils of the Southern High Plains. To do this, plant populations must be high (40,000 to 60,000 plants per acre) and sufficient plant nutrients must be supplied to give maximum or near maximum plant growth.
Relationship of Soil Phosphorus to Fertilizer Response of Irrigated Forage1
Authors: Read D. W. L. 
Published: July 2010

AbstractSodium bicarbonate‐extractable P in the soil was related to fertilizer response of brome grass‐alfalfa mixtures at nine irrigated locations in southwestern Saskatchewan. Phosphatic fertilizer increased the yield and phosphorus content of the forage over that from unfertilized plots on soils with less than 10 ppm bicarbonate extractable phosphorus, but not on soils with more than 20 ppm. The difference attributable to soil P was more distinct when the response from NP fertilizer, was compared to that from N alone. Soil texture, frequency of application of fertilizer and irrigation intensity had little effect on the relative response to fertilizer.
Response of Corn (Zea mays L.) to Population, Bed Height, and Genotype on Poorly Drained Sandy Soil II. Top Growth and Root Relationships1
Authors: Norden A. J. 
Published: July 2010

AbstractTwo corn hybrids were grown at 5 plant populations and 4 bed heights in contrasting wet and dry years. A positive curvilinear relationship was observed between plant population and grain yield per acre. On a per plant basis, increasing the population from 5,000 to 25,000 Jams per acre decreased grain yield 73%; while plant height increased 5% and lodging 17%. Bedding increased grain yields in the wet year but not in the dry year. The grain yield response was more closely associated with the dry weight of roots than with the width or depth of the root clump. Plant height was not greatly affected by plant population or bedding and was not closely associated with root development. Increased lodging at the higher plant populations appeared to be largely the result of a reduction in root density without an accompanying reduction in plant height. The dry weight of roots per plant was 29% greater in a dry than in a wet year; however, the grain yield was 40% less. An interaction between genotype, year and bedding was observed in grain yield and plant height.
Solution and Granular Nitrogen Fertilizers for Crop Residue Management1
Authors: Stroehlein J. L. , Fenn L. B. , Fuller W. H. 
Published: July 2010

AbstractThe effects of solution and granular N fertilizers and straw on the nitrate (NO3) content of soil and cotton petioles were studied in the laboratory and field. In the laboratory, applications of solution N with straw to soils generally resulted in more rapid mineralization of N when compared with granular applications. In the field, applications of N increased soil and petiole NO3 but tended to decrease cotton yields. Granular rather than solution N applied to straw and bare soil generally produced the highest NO3 content of the soil but there was no difference in petiole NO3. Straw alone decreased yields but did not affect soil and petiole NO3. Straw plus N tended to decrease soil and petiole NO3 when compared with N applications alone. N in the solid form at a rate of 125 pounds per acre produced yields statistically equal to the check treatment.
Root Training by Plastic Tubes II. Geotropic Reaction of the Roots of Several Species1
Authors: De Roo H. C. 
Published: July 2010

AbstractIn the greenhouse, the difference in ability of roots of different species to grow upward was appraised by growing plants in U‐shaped tubing. In the field, plants grown in straight tubes were inserted vertically into the prepared plow layer. In curved tubes, cabbage and rape plants rapidly returned their fibrous root systems to their crowns; in the field, they bent upward from the impenetrable plow pan and permeated the plow layer. Other species, such as oats, showed little ability to grow upward in the soil.