bluuebunny/crossref_metadata_2025_split huggingface dataset:
Spontaneous pneumocephalus associated with pneumocele of the frontal sinus
Authors: Park Chong Yoon , Kim Kyung Soo 
Published: July 2010

Background: Pneumoceles of the paranasal sinuses are a very rare condition; characterized by a distended air-filled paranasal sinus extending beyond the margins of the paranasal bone, with bony defects and extension of air into the surrounding soft tissues. Also, spontaneous pneumo-cephalus is a rare condition which represented only 0.6% in the largest reported series of pneumocephalus. Although pneumocephalus caused by sinogenic origins, such as osteoma, has been reported, spontaneous pneumocephalus has not been reported as a complication associated with pneumocele of the frontal sinus. Methods: We report a case of spontaneous pneumocephalus associated with a pneumocele involving the frontal sinus which presented as acute severe headache. Results: To the best of our knowledge, this is the first case report in literature reporting spontaneous pneumocephalus in association with pneumocele of the frontal sinus. Conclusions: Although pneumocele of the frontal sinus is a very rare condition, it can develop into spontaneous pneumocephalus, and thus it needs to be included in the differential diagnosis of acute severe headache.
Some Responses of Alfalfa Varieties to Fertilization and Cutting Treatments1
Authors: Gross H. Douglass , Wilsie C. P. , Pesek John 
Published: July 2010

SynopsisDuring a 2‐year period the following significant alfalfa yield responses were noted: variety × P, variety × cutting treatment and variety × cutting treatment × P. The third year, when plots were harvested alike, significant interactions were: variety × P and previous cutting treatment × K. Several varieties displayed flexibility in response to management practices. As measured in the third year, Buffalo and Vernal were the highest yielding varieties over all treatments. Stand differences, though statistically significant, were small and were not reflected in yield.
Some Above‐ and Below‐Ground Relationships of an Alfalfa‐Orchardgrass Mixture1
Authors: Chamblee Douglas S. 
Published: July 2010

SynopsisA study of above‐ and below‐ground associational effects of alfalfa and orchardgrass was facilitated by partitioning the root systems of certain treatment combinations. Apparently alfalfa was benefited in an indirect manner in that orchardgrass offered less competition, under the conditions of this experiment, for the various growth factors.
Heat Units as a Method of Measuring Maturity in Corn1
Authors: Gilmore E. C. , Rogers J. S. 
Published: July 2010

SynopsisTen hybrids and 10 inbreds were planted on 5 different dates in 1956 and their maturities, based on silking dates, were calculated in heat units by 15 different methods. The present method of calculating degree days, daily mean minus 50° F., was improved by correcting for temperatures below the minimum for growth, 50° F., and above the optimum for growth, 86° F. The number of heat units required for silking, designated as effective degrees, remained relatively constant for crops with different planting dates, while calendar days varied widely.
Megasporogenesis, Embryo Sac Development and Embryogenesis in Dallisgrass, Paspalum Dilatatum, Poir1
Authors: Bashaw E. C. , Holt E. C. 
Published: July 2010

SynopsisA yellow‐anthered Dallisgrass biotype introduced from Uruguay has normal female development and apparently reproduces sexually. Common Dallisgrass reproduces apomictically. The occurrence of nucellar embryo sacs, autonomous embryo development and the necessity of pollination for endosperm development indicate apospory and pseudogamy. Combined evidence from cytological and breeding behavior observations suggests obligate apomixis.
Evaluating the Breeding Potential of Inbred Lines of Corn Resistant to the Leaf Blight Caused by Helminthosporium Turcicum1
Authors: Jenkins Merle T. , Robert Alice L. 
Published: July 2010

SynopsisThirty blight resistant inbred lines differed significantly in their blight reaction as lines, in their reaction in crosses with 3 susceptible tester lines, and in the performance of the F2 progenies from these crosses. There also were highly significant differences in blight reaction among the 3 testers and for the interaction of lines ✕ testers, both for the F1 crosses and for the F2 progenies. Lines identified as superior breeding sources of resistance were GE440, CI.90A, CI.93A, and Wh4971, with CI.86A, CI.28A, and Kyll4 also showing good promise.
Effects of Spacing of Soybean Plants Between and Within Rows on Yield and Its Components1
Authors: Lehman W. F. , Lambert J. W. 
Published: July 2010

SynopsisSeed yields tended to be higher at the narrow spacing between rows. The effects of spacing within row were variable. All four components of yield were affected to some degree by spacing. However, seed and pod numbers were affected more than seed weight and seeds per pod. The relative importance of branches varied with spacing for seed and pod numbers but had little or no effect on seed weight and seeds per pod.
A Comparison of Flue‐Cured Tobacco Varieties Repeated Over Locations and Years with Implications on Optimum Plot Allocation1
Authors: Jones Guy L. , Matzinger D. F. , Collins W. K. 
Published: July 2010

SynopsisVariety ✕ environment first order interactions were small and nonsignificant for most traits studied. But the interaction of variety ✕ location ✕ year was highly significant although small in relation to the variety component for most of the characters. From a comparison of theoretical variances of treatment means with varying plot allocations, adequate information on the relative performance of tobacco varieties in North Carolina can be estimated from data obtained in 2 years, at each of 5 locations with 3 replications.
The Inheritance of Cold Resistance and Its Relation to Fall Growth in F2 and BC1 Generations of Alfalfa1
Authors: Kohel Russell J. , Davis R. L. 
Published: July 2010

SynopsisThe data indicated partial dominance of gene action conditioning cold susceptibility in Canadian Variegated, Du Puits, and African alfalfas, and, using a model for tetrasomic inheritance, 17% of the variation associated with fall growth was attributed to additive gene action.
Residual Heterozygosity in a Variety of Upland Cotton as Measured by Micronaire, Lint Percent, Percent First Harvest, and Yield of Lint1
Authors: Justus Norman 
Published: July 2010

SynopsisStoneville 62 cotton was found to have residual heterozygosity for the four characters measured. This variety of Upland cotton was near genetic equilibrium and had heterozygosity randomly distributed among plants.
Effect of Temperature on Phosphorus Utilization by Native and Introduced Legumes1
Authors: McKell Cryus M. , Wilson Alma W. , Williams William A. 
Published: July 2010

SynopsisTop growth, root growth, and P content usually increased with an increase in temperature or P fertility. Responses of the eight legumes to experimental treatments are discussed in relation to the problem of stimulating annual forage legume growth during the winter and spring growing season.
Evapotranspiration by Irrigated Corn1
Authors: Doss B. D. , Bennett O. L. , Ashley D. A. 
Published: July 2010

SynopsisEvapotranspiration by irrigated corn in Alabama increased with plant development to a maximum of 0.30 inch per day at dough stage and afterwards decreased with physiological activity of the plant. The ratio of evapotranspiration by corn to open pan evaporation varied from 0.38 at emergence to 1.12 during early dough stage, then declined to 0.95 at grain maturity.
Comparative Responses of a Virginia Runner and a Virginia Bunch Peanut to Cultural Control of Stem Rot1
Authors: Garren Kenneth H. , Bailey Wallace K. 
Published: July 2010

SynopsisAn effective means of controlling peanut stem rot was developed by modifying conventional practices of culture. Response of the runner did not support the concept that runner peanuts are resistant to stem rot. The results suggest a probable basis for the concept's persistence—that with conventional cultivation S. rolfsii infection is easier to detect in bunch peanuts than in runner peanuts.
Corn Growth as Affected by Aggregate Stability, Soil Temperature, and Soil Moisture1
Authors: Anderson W. B. , Kemper W. D. 
Published: July 2010

SynopsisThe highest yield was obtained on the 53% water‐stable aggregate treatment, indicating that natural aggregate stability levels may have been higher than those required for optimum yield of corn tops. Corn roots growing in conjunction with the soil microorganisms depleted the oxygen supply of the soil air to somewhat lower values than did the organisms alone. Rate of oxygen use per cc. of roots was greatest at higher oxygen levels and fell off sharply with decrease in oxygen content of soil air.
Effects of Phosphorus and Other Treatments on the Development of Red Fescue, Merion, and Common Kentucky Bluegrass1
Authors: Juska F. V. , Hanson A. A. , Erickson C. J. 
Published: July 2010

SynopsisAccumulation of P in leaves of Merion exceeded that in common bluegrass. Top growth of Merion was significantly greater and root weights significantly less than common bluegrass. Red fescue outyielded common bluegrass in all plant components except rhizomes. Results indicate that these grass species can tolerate high levels of P and that the upper limits of tolerance were not attained in these studies.
Effect of Storage at Four Locations in the West on Longevity of Forage Seeds1
Authors: Hafenrichter A. L. , Foster Ronald B. , Schwendiman John L. 
Published: July 2010

SynopsisSeed of 21 grasses, 4 legumes, and 1 forb, many of which were new to agriculture, was stored for 14 years at 4 widely different locations in the West. Some seeds were processed and some were treated with a fungicide. Germination tests were made annually. The results show that longevity is a species ✕ location interaction. Processing seed did not shorten longevity materially, but treatment with the fungicide had an adverse effect.
Measurement of Water Stress in Cotton Plant Leaf Discs With a Thermocouple Psychrometer1
Authors: Box J. E. 
Published: July 2010

SynopsisPeltier psychrometer has been calibrated to measure water activities equivalent to diffusion pressure deficits (DPD's) of 20 to 65 bars suction at 25° C. Cotton leaf discs studied had DPS's from 40 to 65 bars and relative water contents from 94 to 52%, respectively.
Residue Management in Kentucky Bluegrass (Poa pratensis L.) and Red Fescue (Festuca rubra L.) Seed Fields1
Authors: Pumphrey F. V. 
Published: July 2010

SynopsisSeed yields of Kentucky bluegrass and red fescue were increased significantly by complete removal of post‐harvest residue prior to initiation of fall growth. Burning the residue after the initiation of fall growth significantly reduced seed yields. A positive interaction between residue removal and fertilizer application was measured.
Calcium Movement in Barley and Wheat as Affected by Copper and Phosphorus1
Authors: Brown John C. 
Published: July 2010

SynopsisCopper facilitated the movement of Ca in ‘Hudson’ barley and in ‘Atlas 66’ and ‘Monon’ wheat. Phosphate accentuated Cu deficiency and decreased the translocation of Ca into the upper leaves of Cu‐deficient plants. Cu‐sufficient plants maintained the Ca level in the upper leaves in the presence of high P. A nutritional relationship between Ca, P, and Cu is demonstrated.
Yields, Stand Persistence, and Carbohydrate Reserves of Perennial Grasses as Influenced by Spring Harvest Stage, Stubble Height, and Nitrogen Fertilization1
Authors: Raese J. T. , Decker A. M. 
Published: July 2010

AbstractSpring harvests of orchardgrass, bromegrass, and reed canarygrass were made at pre‐joint, early head, early bloom, and late bloom. At least one aftermath was differentially cut leaving either a 1.5‐ or a 3.5‐inch stubble. Nitrogen was applied at either 25 or 75 pounds N per acre per harvest.Yields increased with maturity at harvest. Greatest persistence with least weed encroachment was obtained at late bloom. The effects of stubble height varied with species, harvest date, and nitrogen rate. Yields were increased with high nitrogen even though stand was reduced. Although a negative relation existed between fructose and aftermath forage production, total fructose was positively correlated with etiolated tiller growth.
Soil Strength and Seedling Emergence Relations II. A Generalized Relation for Gramineae
Authors: Taylor H. M. , Parker J. J. , Roberson G. M. 
Published: July 2010

AbstractThe relation between soil strength, as measured with a penetrometer, and emergence of corn, onions, barley, wheat, switchgrass, and rye seedlings was determined in laboratory studies. This relation was approximately similar for all gramineae used in these tests. Emergence percentages decreased slightly as penetrometer soil strengths increased to the range of 6 to 9 bars. As soil strengths further increased, gramineae seedling emergence decreased until no emergence occurred above the range of 12 to 18 bars strength. Oxygen concentrations ranging from 7 to 42% did not alter the soil strength‐seedling emergence of a grain sorghum. Emergence of onions, a monocotyledonous species but not a gramineae, was prohibited by 2 bars of penetrometer soil strength.
Comparison of Yield Components and Agronomic Characteristics of Four Winter Wheat Varieties Differing in Plant Height1
Authors: Johnson V. A. , Schmidt J. W. , Mekasha W. 
Published: July 2010

AbstractFour hard red winter wheat varieties differing in plant height were compared in a 4‐year field study conducted at locations in Nebraska and Colorado. Yield, spike number, number of kernels per spike, kernel weight, and 11 other agronomic characteristics were studied.The short‐statured varieties, ‘C.I. 13678’ and ‘C.I. 13677,’ were more productive on the average than the taller varieties, ‘Pawnee’ and ‘Cheyenne.’C.I. 13678, which was highest‐yielding, consistently produced more kernels per spike, but its kernel weight and spike number were less than the other varieties. C.I. 13677, the variety with the shortest straw, produced lighter‐weight grain and fewer spikes than Pawnee and Cheyenne.The high number of kernels per spike of C.I. 13678 was associated with more spikelets per spike and more kernels per spikelet than were produced by the other varieties. C.I. 13677 had fewer spikelets but more kernels per spikelet than the taller varieties. Although their flag leaves were shorter than Pawnee, the greater leaf width of C.I. 13678 and C.I. 13677 produced total flag leaf area equal to, or greater than, Pawnee.Yield and yield component relationships among the varieties studied are discussed.
Sunflower‐Soybean and Grain Sorghum‐Corn Rotations Versus Monoculture1
Authors: Robinson R. G. 
Published: July 2010

AbstractCrop alternation was compared with continuous cropping for sunflowers and soybeans and for grain sorghum and corn at Rosemount, Minnesota. No fertilizer was used in order that full effect of crop removal could be observed.Yields from crop alternations of corn‐sorghum or sunflower‐soybeans exceeded those from continuous cropping. Sunflower‐soybean alternation was superior to continuous sunflower in sunflower disease control. Soybeans in a corn or sorghum sequence greatly increased yields of the feed grains. Differences between sunflowers and soybeans and between sorghum and corn in effect on soil pH and depletion of acid‐soluble P and K were small and unimportant.Verticillium albo‐atrum on sunflowers increased during the study and became the major factor affecting yield. The benefit of rotation in delaying the appearance of the disease was evident even though one might expect spread of inoculum from plot to plot by tillage practices. No other disease or insect problem was observed as a result of continuous cropping of plots to sunflowers, soybeans, grain sorghum, or corn.
Soil Conditions and Root Distribution in Two Wet Meadows of the Nebraska Sandhills1
Authors: Moore A. W. , Rhoades H. F. 
Published: July 2010

AbstractRoot distribution and properties of two meadow soils in the Nebraska Sandhills were studied. Profile 1 was alkaline while profile 2 was acidic. Both sites carried some legumes but late‐maturing grasses predominated at site 1 and early‐maturing grasses at site 2.Soil moisture was related to water‐table level. Soil temperatures at the 4‐in. depth remained between 60 and 75F for most of the growing season. Soil aeration was good throughout the growing season, the oxygen content to a depth of 2 to 3 feet rarely falling below 15%.The broad pattern of root distribution in both soils consisted of a heavy concentration of roots near the surface and a rapid decline with depth. The total weight of roots to a depth of approximately 4 feet was 5.5 and 7.3 tons per acre for soils 1 and 2 respectively. One‐half to two‐thirds of the roots were found in the surface 2 inches. This broad pattern may be attributed to the influence of a high, fluctuating water table.Soil chemical properties appeared to be the dominant factors resulting in differences in root distribution between the two soils. Grass root penetration virtually ceased on reaching sand low in nutrients.
Utilization of Tracer Nitrogen by Rice in Relation to Time of Application1
Authors: Patnaik S. , Broadbent F. E. 
Published: July 2010

AbstractUptake of N16 tagged ammonium sulfate by rice plants was used to evaluate the efficiency of fertilizer applications. Two‐thirds of the basal rate at planting followed by one‐third top‐dressed at boot stage resulted in the highest recovery of fertilizer nitrogen as compared to the full rate at planting or top‐dressing at the tillering stage.
Stem‐Solidness Stability in Spring Wheat, Triticum Aestivum L. Em. Thell.1
Authors: McNeal F. H. , Wallace L. E. 
Published: July 2010

AbstractEight plant introductions and four commercial varieties of spring wheat were evaluated for stem‐solidness at five locations. Location and location ✕ variety effects were significant, indicating that entries were influenced by environment, and differentially so by some environments. Differences among locations in average plant and internode stem‐solidness scores indicated that the six P.I. 94585 selections were most stable and least influenced by environment. Pith development of the top internode was influenced most by environment.
Differential Tolerance of Soybean Varieties to an Acid Soil High in Exchangeable Aluminum1
Authors: Armiger W. H. , Foy C. D. , Fleming A. L. , Caldwell B. E. 
Published: July 2010

AbstractSoybean varieties, representing 10 maturity groups (from North to South), differed significantly in their tolerance to acid Bladen soil (pH 4.4) which contains a high level of KCl‐extractable Al. Previous evidence that Al toxicity is the primary growth‐limiting factor in this soil, and the observation that varietal differences were minimized or eliminated by liming the soil to pH 5.5, led to the conclusion that certain varieties differ in their tolerance to Al. Leaf chlorosis and petiole collapse, observed at low lime levels near the end of one experiment, were tentatively attributed to Al‐induced Ca deficiency and not to a simple Ca deficiency in the acid soil.Results of these studies suggest the possibility of breeding soybean varieties with greater tolerance to Al and, therefore, greater abilities to exploit acid, Al‐toxic subsoils for both water and nutrients.
Root Structure Reflects Differential Aluminum Tolerance in Wheat Varieties1
Authors: Fleming A. L. , Foy C. D. 
Published: July 2010

AbstractDifferential Al tolerance of Atlas 66 and Monon wheat varieties was associated with morphological damage of root tips and lateral roots.The response of the root systems to Al was controlled by the sensitivity of the roots, as well as by the concentration of soluble Al in the growth medium. The action of Al was local rather than systemic, and was restricted for the most part to the sensitive root tips and lateral roots. More resistant meristematic areas remained functional, as evidenced by the emergence of new roots when the Al stress was removed.
Zinc Deficiency Symptoms and Zinc and Phosphorus Interactions in Several Strains of Corn (Zea mays L.)1
Authors: Halim A. H. , Wassom C. E. , Ellis R. 
Published: July 2010

AbstractZinc deficiency studies were conducted on several inbreds and single crosses of corn in the field and growth chambers. The degree and pattern of zinc deficiency symptoms varied with plant genotype. Some inbreds showed early resistance, becoming susceptible at later stages of growth. Other lines showed the reverse effect, that is, susceptible in early stages of growth and resistant later. Single crosses of these lines resulted in high resistance to zinc deficiency. The appearance of the root system indicated that highly resistant lines had normal and healthy root development whereas susceptible lines had reduced root development and decayed root tips.Differences in zinc and phosphorus accumulations were found in the leaf tissue, but levels of zinc and phosphorus showed no association with zinc deficiency symptoms. High phosphorus did not appear to reduce the uptake of zinc when lines were considered as a whole. However, high phosphorus appeared to reduce the dry weights of the plants.Zinc content of some seed sources varied among lines but phosphorus level showed no marked variations. Lines expressing early resistance had higher seed zinc content and late resistant lines had lower seed zinc content.The nature of resistance to zinc deficiency appeared to be under genetic control.
Grain Yield and Kernel Quality of Winter Barley (Hordeum vulgare L.) Harvested at Different Moisture Levels1
Authors: Brewer Donald H. , Poehlman J. M. 
Published: July 2010

Abstract‘Mo. B‐475’ winter barley (Hordeum vulgare L.) was harvested at daily intervals at Columbia and Portageville, Missouri, beginning when the moisture content of the kernels was around 50%, and continuing until the moisture content dropped to about 10%. Grain yield, 1,000‐kernel weight, and test weight increased as moisture content declined to around 40% but remained relatively constant thereafter. Kernel size increased until the moisture content decreased to about 30% and remained relatively constant thereafter. Barley Agtron color did not change significantly over the range of moisture contents studied. Percentage of nitrogen increased slightly as moisture declined but the change was nonsignificant.
Response of Peas (Pisum sativum L.) to Plant Population and Spacing1
Authors: Gritton Earl T. , Eastin John A. 
Published: July 2010

AbstractEarly (‘Alaska’) and late (‘New Line Early Perfection’) processing pea cultivars were grown in all possible combinations of three row spacings and three populations during 1965 and 1966. Row widths of 9, 18, and 27 cm and population levels of 1,660,000, 1,110,000, and 550,000 plants/ha were used. Maturity, height, total number of nodes, lowest pod bearing node, average size of shelled pea, and number of ovule initials were not greatly affected by the treatments. Productivity per plant and plant population were inversely related. Yields generally increased with increased population and/or decreased row spacing. Greatest yields were obtained with the highest population grown in the narrowest rows.
Windblown Soil Abrasive Injury to Cotton Plants1
Authors: Armbrust D. V. 
Published: July 2010

AbstractAn experiment was established to study the resistance of an upland variety of cotton to soil abrasion and the recovery characteristics of damaged plants. An increase in the amount of soil striking a young cotton plant decreased the plant growth rate and yield, delayed first bloom, and increased the number of plants lost. A soil loss of less than 3.8 kg/ha (1.7 tons/acre) on 1‐ to 3‐weekold cotton plants did not decrease yields.