bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Organic Additions and Flooding on Iron and Manganese Uptake by Rice1
Authors: Clark Francis , Nearpass D. C. , Specht A. W. 
Published: July 2010

SynopsisOrganic amendments in addition to flooding were injurious to rice yields and increased plant Fe uptake but decreased Mn. The Fe levels in plants grown submerged in water and unsubmerged without organic amendments were found comparable, but the submerged yields were higher and were accompanied by a Mn uptake more than tenfold that of rice grown unsubmerged. Marked yield response to Mn was obtained in upland cultures. Levels of Mn found in plants indicate that rice has a high requirement for and an exceptionally high tolerance to Mn.
An Evaluation of Ten Phosphorus Sources by Growth of Four Field Crops1
Authors: Robertson W. K. , Hutton C. E. 
Published: July 2010

SynopsisCorn, peanuts, oats, and soybeans responded somewhat differently but in general phosphorus sources could be arranged in the following descending order of response: superphosphate, dinitra phosphate (17‐22‐0), fused tri‐calcium phosphate (<40 mesh), dinitra phosphate (17‐33‐0), fused tri‐calcium phosphate (<10 mesh), concentrated superphosphate, calcium metaphosphate, potassium metaphosphate, and rock phosphate. Basic slag was also tested but rates of application were higher.
Plot Competition Between Corn Hybrids1
Authors: Genter C. F. 
Published: July 2010

SynopsisAn early hybrid provided less plot competition than a late hybrid in an interplanting of an early and a late hybrid over a 2‐year period. Yields averaged 5.9% higher in plots with early borders. Yields of the early hybrid tended to be lower if bordered on one or both sides by the late hybrid than if both borders were early, whereas yields of the late hybrid tended to be higher if bordered on one or both sides by the early hybrid than if both borders were late.
Long‐Time Trends in Grain Yields of Five Rice Varieties1
Authors: Adair C. Roy , Cralley E. M. , Johnston T. H. 
Published: July 2010

SynopsisThe average yields of Fortuna increased each 7‐year period of the 28 years. The 7‐year average yields of the 4 varieties susceptible to diseases present during the period varied according to prevalence or control of specific diseases. White tip control appears to be necessary to get a maximum response from nitrogen fertilizer in susceptible varieties. Short or long term yields may be a poor basis for predicting comparable yields of rice varieties that differ in disease reaction.
Minor Element Content of Eight Kentucky Soils and Lespedeza1
Authors: Seay William A. , DeMumbrum L. E. 
Published: July 2010

SynopsisAverage ppm. of available minor elements in soils were 0.2 of Co, 1.7 of Zn, 0.8 of Cu, 25 of Mn and 0.8 of Ni; total ppm. in the Korean lespedeza: 0.6 of Co, 10.5 of Zn, 10 of Cu, 350 of Mn and 2.5 of Ni. Liming decreased availability of these five elements and available minor elements varied noticeably among soil types. Adding “major” nutrient fertilizers may in time decrease the available minor element content of soils because of removal in larger crop yields; available minor elements in soil may vary considerably with season.
An Automatic Mechanism for Imposing Photoperiods in Greenhouse Research1
Authors: Coffindaffer B. L. , Burger O. J. 
Published: July 2010

SynopsisAn automatically controlled canopy for regulating light and dark periods in greenhouse work was designed, installed, and operated successfully. This system effectively provided three photoperiods on the same bench covering a total area 5 by 30 feet in size.
The Effect of Some Background Attributes on Grades of Students in the Beginning Crop Production Course1
Authors: Burger A. W. 
Published: July 2010

SynopsisSignificant association of grades was found with (a) farm experience, (b) vocational goal, (c) scholarship holders, and (d) course workload. Higher percentages of grades A and B and lower percentages of grades D and E were found for: (a) students from the farm than for those from the city; (b) graduate workers, vocational agriculturists, and farm advisors than for farm salesmen, farm editors, farmers, and farm managers; (c) students in the farm group with scholarships than for those without; and (d) students with heavy course workloads than for those with light workloads.
Lodging Resistance Studies in Oats I. Comparing Methods of Testing and Sources for Straw Strength1
Authors: Murphy H. C. , Petr F. , Frey K. J. 
Published: July 2010

SynopsisThe snap test and the lodging resistance factor were highly correlated with natural lodging. Oat varieties CI 7318, 5154, 7317, and 7026 were superior for straw strength.
Variability in Reed Canarygrass, Phalaris Arundinacea L. I. Agronomic Characteristics1
Authors: Baltensperger A. A. , Kalton R. R. 
Published: July 2010

SynopsisRanges in leafiness from 18 to 47%, in leaf width from 9 to 25 mm., and in bloom date from June 1 to June 16 were found among spaced plants. Estimates of genotypic variation among plants were 73, 66, 48, and 26% for leafiness, leaf width, bloom date, and hay vigor, respectively. Seed yields of loreed were lower than all other accessions when grown in cultivated rows. Several lots from southern areas were poor in winter hardiness, vigor, and recovery.
Field Studies in Prevention of Soil Salinization
Authors: Asghar A. G. , Khan M. A. Hafeez 
Published: July 2010

SynopsisIn soil profiles in which salts are rising towards the surface, damage to productivity was prevented by adoption of suitable crop rotations. When the salts had risen up to 5‐foot depth from the surface a 2‐year rotation with one rice crop—cotton‐senji, rice, wheat—was initially required to depress the salts below 6‐feet depth. When the salts were below 6 feet and 8 feet, respectively, a 4‐year rotation—cotton‐senji, sugarcane, wheat, rice”was found adequate for keeping the salts depressed below that depth.
Development of Spring Wheat: III. Temperature of Maturation and Age of Seeds as Factors Influencing Their Response to Vernalization1
Authors: Riddell J. A. , Gries George A. 
Published: July 2010

SynopsisThe difference in the rate of development between early (White Federation 38 and Progress) and late (Chinese and Warden) maturing varieties of spring wheat was overcome by a 60‐day vernalizing treatment. The responsiveness to vernalization of plants grown from seed harvested in different years varied unpredictably.
The Effect of Nematode Control on the Growth and Nutrition of Certain Agronomic Crops1
Authors: Wilcox G. E. , Hollis J. P. , Fielding M. J. , Newsom L. D. , Russel D. A. 
Published: July 2010

SynopsisCorn, cotton, and sorgo yields were increased while oats and clover yields were not affected by fumigation. The effect of fumigation was limited to the year of the treatment and nematode population built up rapidly after three months following treatment. Chemical composition of tissue was not significantly affected by nematode damage but total nutrient uptake expressed by the association of total growth and chemical composition was increased for those crops that responded to nematode control.
Performance of Irrigated Grass‐Legume Associations at Two Locations in Mexico1
Authors: Duller Roderic E. , Garza T. Ricardo 
Published: July 2010

SynopsisPerennial grasses performed poorly when grown in association with legumes under irrigation in temperate central Mexico. Unassociated alfalfa and medium red clover were outstanding in the Valleys of Mexico and Toluca, respectively.These findings have served to orientate the research and extension programs devoted to increasing forage production within these milk‐shed areas. The results have also emphasized the need for experimentation under local conditions of forage resources commonly utilized in other temperate regions.
Variability in Results from Greenhouse Pot Experiments Comparing Phosphorus Rates and Sources1
Authors: Terman G. L. 
Published: July 2010

SynopsisHighly significant decreases were found in C.V. with increases in mean yields of dry matter by corn, small grains, and grasses. Error mean squares and standard errors per pot increased with mean yields. Variability in uptake of P was equal to or greater than for yields of dry matter by the various crops. Stands of plants and method of mixing phosphates affected variability.
Sulphur Dioxide Fumigation of Cotton With Special Reference to Its Effect on Yield1
Authors: Brisley H. R. , Davis C. R. , Booth J. A. 
Published: July 2010

SynopsisThe relationship between the percent of foliage area destroyed (X) and the percent of crop (Y) is expressed by the regression formula Y = 99.26 — 0.68X. There was no crop loss without visible leaf injury and no increase in the incidence of disease.
Combining Ability in Bromus Inermis Leyss1
Authors: Timothy D. H. , Thomas H. L. , Kernkamp M. F. 
Published: July 2010

SynopsisThe clones differed in general combining ability for forage yield, seed yield, and leaf spot reactions. For plant height, specific combining ability was significant and general combining effects were not present. In general, there was fair agreement among the rank of clones and the two measures of combining ability, polycross progeny performance and average single cross performance.
Liming Qualities of Three Cement Kiln Flue Dusts and a Limestone in a Greenhouse Comparison1
Authors: Whittaker Colin W. , Erickson C. J. , Love Katharine S. , Carroll Dorothy M. 
Published: July 2010

SynopsisThree cement kiln flue dusts had about the same soil liming qualities as pulverized limestone. In cultures all receiving the same total amount of soluble potash, the dusts produced alfalfa yields on initially acid soils equal to or exceeding those produced by the limestone and had similar effects on soil pH, potassium and calcium contents of the crop, and on crop reduction through overliming.
Some Relationships Between Climate and Yields of Corn and Wheat in Spink County, South Dakota, and Yields of Milo and Cotton at Big Spring, Texas1
Authors: Moldenhauer W. C. , Westin F. C. 
Published: July 2010

SynopsisTemperature was a highly important factor in crop yields. In Spink county, the effect of June and July average maximum temperatures on wheat and corn yields, respectively, overshadowed the effects of rainfall for these two months. At Big Spring, temperature effects also overshadowed the effects of seasonal rainfall. An explanation for the overshadowing effect of temperature is that summer temperatures reflect preceding climatic conditions whereas precipitation does not.
Inheritance of a Flower Character, Brown Keel Tip, in Lotus Corniculatus L.1
Authors: Hart R. H. , Wilsie C. P. 
Published: July 2010

SynopsisSegregation in F1, F2, F3, and BC progenies from the cross, brown keel tip ✕ normal, suggested that brown keel tip was conditioned by a single dominant gene, B, inherited tetrasomically. A deficiency of recessive phenotypes was postulated to be due to the operation of alleles, CC, at an independent locus. The interaction of genes from these two loci appeared to be such that the double recessive form, bbbb cccc, was a zygotic lethal.
Metabolic Changes Induced in Alfalfa During Cold Hardening and Freezing1
Authors: Swanson C. R. , Adams M. W. 
Published: July 2010

SynopsisRespiration during hardening of Arizona Chilean and Teton alfalfas was determined daily in plants subjected to 4 combinations of daylength and temperatures. Respiration increased in plants exposed to alternating temperatures regardless of daylength when measured at a constant 30° C. The same varieties, when frozen and thawed, showed higher respiration when previously hardened under alternating temperatures and short days, and the hardy variety Teton showed the greatest respiratory response to hardening.
Inbreeding Depression of Diallel Crosses of Selected Lines of Corn1
Authors: Rumbaugh M. D. , Lonnquist J. H. 
Published: July 2010

SynopsisThe yield and plant and ear height data indicated that the relative importance of non‐additive sources of variation was quite small when compared to the variation explainable in terms of the additive model of gene action. Although the data preponderantly favored partial dominance, some indications of overdominance were obtained.
The Use of Chromosome Deficient Plants in Cytogenetic Analyses of Alfalfa1
Authors: Stanford E. H. 
Published: July 2010

SynopsisA method is outlined by which alfalfa plants deficient for one chromosome, properly called trisomic tetraploids, may be used to identify genetic characters with a particular chromosome. One association of this type between a chromosome and a genetic character, “sticky leaf,” is described. The method will be useful in determining which chromosomes give disomic and which tetrasomic inheritance in alfalfa.
Vertical Distribution of Topdressed Fertilizer Phosphorus and Potassium in Relation to Yield and Composition of Pasture Herbage1
Authors: Doll E. C. , Hatfield A. L. , Todd J. R. 
Published: July 2010

SynopsisYield of grass‐legume pasture for 2 years was increased by fertilization with P but not with K. Large amounts of nonexchangeable K were released when crop removal of K exceeded rate of application, but only relatively small amounts of applied K were fixed even when rate of application exceeded crop removal. No movement of P was detected below 3 inches, and no movement of K below 6 inches.
Comparisons of Nitrogen Source Materials for Midseason Fertilization of Sugar Beets1
Authors: Loomis R. S. , Brickey J. H. , Broadbent F. E. , Worker G. F. 
Published: July 2010

SynopsisNitrate carriers proved to be more suitable than ammonium carriers for late‐season or emergency applications. Differences in plant response were interpreted through soil and tissue analyses.
Selection for Vegetative Vigor and Seed Setting in Birdsfoot Trefoil (Lotus corniculatus L.)1
Authors: Peacock H. A. , Wilsie C. P. 
Published: July 2010

SynopsisWide differences among clones in vegetative vigor and seed production were evident; however, no apparent gain in either characteristic was made through two cycles of selection. The performance of open pollination progenies proved to be a good indication of diallei cross performance. Environmental, genetic, and observed correlations, and environmental and genetic path coefficients indicated that genetic effects were more important than environmental effects in contributing to the observed variability in various progeny characters.
Effect of Freezing Temperatures on Seed Viability and Seedling Vigor of Grain Sorghum1
Authors: Carlson Gerald E. , Atkins R. E. 
Published: July 2010

SynopsisThe effect of freezing temperatures on grain sorghum seed of varying moisture content was manifest primarily as reduction in viability, with no appreciable reduction in seedling vigor. Reduction in viability was dependent upon differences in genotype, freezing temperature, duration at freezing temperature, and grain moisture content.
Effects of Nitrogen and Phosphorus Fertilizers on the Yield of Irrigated Grain Sorghum in Southwestern Kansas1
Authors: Herron George M. , Erhart Andrew B. 
Published: July 2010

SynopsisGood grain yields were obtained with 40 to 80 pounds of nitrogen per acre. There was little yield response to phosphorus. Soil organic matter was not a reliable index to the need for nitrogenous fertilizer.
Effect of Time of Applying Nitrogen Fertilizer on Yield of Hops1
Authors: Brooks S. N. , Keller K. R. 
Published: July 2010

SynopsisGreater yield responses were obtained from early applications of nitrogen fertilizer to hops than from late applications. Supplying the fertilizer in split applications had no advantage over supplying a like total amount all at one time. Nitrogen fertilizer had no effect on the percentages of chemical quality components in the strobiles.
Response of Orchardgrass, Dactylis glomerata L., to Nitrogen Fertilization and Time of Cutting1
Authors: Scholl J. M. , McIntosh T. H. , Frederick L. R. 
Published: July 2010

SynopsisYields of orchardgrass were increased significantly by NH4NO3 and NH3 in 1956 in southern Iowa. First cutting yields from NH3 were reduced because of applicator tillage effects under drouth conditions. Nitrogen carryover was significant. Plots first cut on May 10, 1957, produced lower yields than those cut for the first time on May 1, 20, or 30. Plots cut first time on May 30 yielded highest; nitrogen content was highest on those cut first May 1.
A Five‐Year Comparison of Rock Phospate and Concentrated Superphospate for Several Forage Crops1
Authors: Jackson James E. , Burton GLenn W. 
Published: July 2010

SynopsisRock phosphate, at high rates, compared favorably with concentrated superphosphate. Sweet clover utilized rock phosphate more efficiently than other legumes when lime was also applied, but was very inefficient in the absence of lime. Six hundred pounds per acre of P2O5 from rock, supplemented with 60 pounds from concentrated superphosphate applied the first year, resulted in more total forage during 5 years than did 120 pounds per acre of P2O5 from concentrated super applied annually.
Grain Sorghum Caryopsis Development. I. Changes in Dry Weight, Moisture Percentage, and Viability1
Authors: Kersting J. F. , Stickler F. C. , Pauli A. W. 
Published: July 2010

SynopsisIn Combine Kafir‐60 grain sorghum, maximum dry weight accumulation was found 45 days after pollination with 23% moisture in 1958 and at 33 days with 30% moisture in 1959. Emergence in soil in the greenhouse exceeded 90% from seed 18 days old and older in 1958, and 86% from 33‐day and older seed in 1959. Significant decreases in seedling vigor were obtained from seed harvested at 21 and 18 days, respectively, in 1958 and 1959. Significant correlations were noted between seed and seeding weights, and between seed weight and percentage emergence.
Transpiration and Evapotranspiration of Corn as Related to Meteorological Factors1
Authors: Fritschen Leo J. , Shaw R. H. 
Published: July 2010

SynopsisThe plastic film, covering the ground, which was used to suppress evaporation also altered the micro‐climate. To obtain values of transpiration for the natural plots, the transpiration measured in the plastic‐covered plots was adjusted using the ratios of energy intercepted by the plant canopies. It was found that the adjusted transpiration was .89 of evapotranspiration. Without adjustment, it was .73 of evapotranspiration.
Seedling Growth Differences of Several Cotton Varieties and the Influence of Gibberellin1
Authors: Bird L. S. , Ergle David R. 
Published: July 2010

SynopsisVarieties differed in seedling growth, with rapid emergence and seedling height being positively correlated. Varieties varied in their response to gibberellin, with the faster‐emerging, taller seedling types giving the greatest response.
A Comparison of Birdsfoot Trefoil and Ladino Clover under Varying Irrigation and Fertility Levels1
Authors: Cooper Clee S. 
Published: July 2010

SynopsisIncreasing frequency of irrigation gave a marked response with Ladino clover, but not with birdsfoot trefoil. Part of the response of Ladino clover was attributed to a better medium on irrigated plots for the regeneration of clover stands which were depleted from winterkilling. Birdsfoot trefoil did not respond to irrigation because of the presence of a shallow water table within reach of birdsfoot trefoil roots. Frequent irrigations resulted in decreased stands of birdsfoot trefoil which were accompanied by an ingress of weeds.
Fertilizer‐Induced Changes in Botanical Composition, Yield, and Quality of Native Meadow Hay1
Authors: Rumburg C. B. , Cooper C. S. 
Published: July 2010

SynopsisHigh rates of N and P fertilizers and manure changed the botanical composition and increased hay yields from native flood meadows. Rush and sedge composed 62, 54, 12, and 4% of the hay at 0, 200, 400, and 600 lb. N/acre, while grasses composed 20, 44, 88, and 96% with the same rates of N. Yields of hay were significantly increased with N, P, and manure. The treatments had little effect on the crude‐protein content in the hay. Increasing rates of N decreased the P content in the forage.
Single vs. Split Potassium Applications for Coastal Bermudagrass1
Authors: Burton Glenn W. , Jackson James E. 
Published: July 2010

SynopsisSplitting annual potash applications increased hay yields of Coastal bermudagrass only as available potassium in the soil reached a very low level. Splitting potash applications, however, consistently increased available potassium in the soil over single applications. Luxury consumption of potassium can be reduced by making split applications of potash at no more than half the nitrogen rates on soils kept low in available potassium.
Corn Grain and Silage Yields in Hokkaido, Japan1
Authors: Drake Mack , Ishizuka Y. , Gotoh K. 
Published: July 2010

SynopsisRelatively early maturing dent corn hybrids from the USA and Japan were grown in Hokkaido in 1958 and 1959. Yields of grain and silage were comparable to those of northern U.S.A. Cornbelt. Response to nitrogen and interaction between hybrid and location were measured. Population, studies at two locations were reported.
Generalization of Yield Equations in Two Variables: III. Application of Yield Data from 30 Initial Fertility Levels1
Authors: Voss Regis , Pesek John 
Published: July 2010

SynopsisRestrictive second degree polynomial yield equations in N and P for oats grown in the greenhouse at each of 30 different initial fertility levels within one soil type were utilized in the application of a generalization procedure previously proposed in this series. A multiple regression model including N and P fertilizer and soil test levels plus all possible linear interactions gave good evidence that the yields from the different initial fertility levels belonged to the same general yield surface.
Controlled Soil Cracking as a Possible Means of Moisture Conservation on Wheatlands of the Southwestern Great Plains1
Authors: Johnson Wendell C. 
Published: July 2010

SynopsisDiscontinuities in moisture extraction leading to soil cracking in a predetermined pattern were caused by removal of a portion of the stand in a field of wheat. Depending on orientation, the average width of the cracks induced was 1% to 2 times that of naturally occurring cracks. Controlled soil cracking to increase crack size is suggested as an economically feasible method for increasing the depth and rate of penetration of rains on dry‐farmed wheatland.
Soybean Chlorosis from Heavy Fertilization1
Authors: Weber J. B. , Caldwell A. C. 
Published: July 2010

SynopsisHeavy applications of concentrated superphosphate alone and in combination with KCl resulted in chlorotic plants. There was evidence that K was limiting on plants receiving high rates of P and that Mn was limiting on plants receiving high rates of both P and K. Applications of Mn chelates gave a slight increase in yield on plots that received high rates of P and K and a large decrease on plots that received P only.
Use of Radiophosphorous in Measuring Root Growth of Sorghums1
Authors: McClure Jerry W. , Harvey Clark 
Published: July 2010

SynopsisRadiophosphorus provides a means of measuring the rate and extent of root growth throughout the growing season under field conditions with a minimum of soil disturbance. Data reported herein substantiate other findings on depth and lateral spread of grain sorghum roots but show, in addition, that significant root growth was made by a sorghum hybrid after flowering.
Saline Irrigation of Several Vegetable Crops at Various Growth Stages. I. Effect on Yields1
Authors: Lunin J. , Gallatin M. H. , Batchelder A. R. 
Published: July 2010

SynopsisThere were significant reductions in yield for all crops with increasing salinity. With the exception of beet tops and broccoli tops, reductions in yields were significantly less when salinized at more mature growth stages. Tomato tops and pepper tops were the only crops tested which showed a significant interaction between growth stage and salinity