Browsing by Subject "Cotton growing"
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Item Accumulation of nitrogen, phosphorus, potassium, and calcium in cotton plants grown on Pullman Clay loam soil(Texas Tech University, 1956-05) Thaxton, Earnest LNot availableItem An economic analysis of yearly optimum planting date determination for irrigated cotton on the South Plains of Texas, 1953 to 1958(Texas Tech University, 1962-05) O'Dell, Charles A.The general purpose of this study is to provide information and recommendations which will assist farmers of the South Plains area in becoming more proficient in their decision making concerning optimum cotton planting dates, thereby becoming more efficient in their farming operations* The result of this increased efficiency will reflect in a higher income position of the farmer due to the increased production with the same or lower cost.Item Cotton growth and development as influenced by environment and genetics(Texas Tech University, 1983-05) Hicks, Stanley KimNot availableItem Development of genetic markers to identify cultivars and populations of upland cotton (Gossypium hirsutum)(Texas Tech University, 1995-08) Carron, Susan C.The genus Gossvpium. a member of the family Malvaceae, contains the species of cultivated upland cotton. Gossypium hirsutum or upland cotton is an allotetraploid ("AD-genome"; 2n=4x=52) species resulting from hybridization of an African or Asian diploid ("A-genome"; 2n=26) with a diploid American ("Dgenome") species (Endrizzi et al., 1985; Wendel, 1989; VanderWiel et aL, 1993). Upland cotton provides the bulk of the world's cotton. Cotton is the world's most important textile fiber, and the second most valuable oil and meal seed (Wendel et aL, 1992). In Texas alone, six million bails of cotton are produced annually. At current market prices ($ 1.00/lb.) and 500 pounds per bail, the total value of the Texas cotton crop is five billion dollars at the gin. Obviously, this has a significant impact on the economy of Texas.Item Development of pre-harvest cotton fiber quality prediction equations(Texas Tech University, 1989-05) Warrick, Billy EugeneCotton (Gossypium hirsutum L.), the major crop of the Southern High Plains of Texas, serves as a major source of income in several counties of the South Plains. Pre-harvest knowledge of fiber properties is valuable to buyers, sellers, and processors of cotton. The current pre-harvest sampling technique requires considerable time, effort, and resources. This research was conducted to determine the feasibility of predicting cotton fiber length, micronaire, and strength before harvest, with regression equations based on climatic variables under both dryland and irrigated production. This study utilized the developed equations to predict fiber properties of the 1982 through 1987 Southern High Plains cotton crops and to determine their accuracy in estimating overall crop quality. Multiple-regression analysis of fiber quality properties and weather variables (solar radiation, heat units, rainfall, and rainfall plus irrigation) were used to develop these equations. Cotton fiber quality data were obtained from the High Plains Research Foundation at Halfway and the Texas Agricultural Research and Extension Center at Lubbock from 1982 through 1987. The predictive equations developed included: fiber length, micronaire, and strength under irrigated production with R values of .66, .59, and .51, respectively. Also, fiber length, micronaire, and strength under dryland production with R^ values of .76, -59, and .19, respectively. Irrigated production refers to crop development utilizing seasonal rainfall plus two irrigations (pre-plant plus one during the growing season). Dryland production refers to crop development utilizing seasonal rainfall only. Fiber quality predictions as compared to the actual USDA Cotton Classing Office averages varied by -0.42 to +1.79 32nds of an inch for fiber length, -0.10 to +0.27 for micronaire and -0.50 to +1.63 gram per tex for strength for the years 1982 through 1987. Predictions made by these equations were not consistent enough to be used for making marketing decisions. Additional field studies are needed to improve the predictive capabilities of these models.Item Differentiation of the outer epidermis of the cotton ovule(Texas Tech University, 1973-08) Knezek, David JohnNot availableItem Economic, environmental and policy factors affecting cotton yields in the Texas High Plains(Texas Tech University, 1986-05) Neal, Tamera JeanneSince 1966, annual cotton yields in the Texas High Plains have shown a negative trend of about 10 pounds per acre per year. The purpose of this study was to determine which major variables affect cotton yields and what effect the variables have had on Texas High Plains yield trends. Data from twenty-five High Plains counties were analyzed, and yield and acreage equations were estimated. Variables found to be significant in the yield equations included rainfall variables, fertilizer price, and irrigation water available for use. Variables found significant in the acreage equations included government program provisions for acreage controls, diversion payments, and payment limitations along with expected price of cotton, production costs for wheat, and wheat-cotton price ratio. Fertilizer price was the only variable which showed a significant trend since 1966. Across the Texas High Plains region, the average percent of yield trends not explained was 38% for irrigated cotton and 52% for non-irrigated cotton. From the study, it was concluded that acreage harvested had no direct impact on cotton yields in the Texas High Plains, and input costs had a significant effect on declining yields. It was recommended that a different approach to determining causes for declining yields in the Texas High Plains was needed.Item Effect of Plant Spacing Configurations On The Cotton Plant and Fiber Characteristics(Texas Tech University, 1973-05) Langford, Loyd RayNot Available.Item Effect of seed size and specific gravity on field performance and lint characteristics of four varieties of upland cotton(Texas Tech University, 1973-05) Lema Osores, Victor GNot availableItem Evaluating crop and revenue insurance products as risk management tools for Texas cotton producers(Texas Tech University, 2000-08) Field, James E.Information on the efficacy of various crop and revenue insurance products on Texas cotton producers is not currently available. It is not known why Texas cotton producers purchase so little insurance above catastrophic levels. It could be that the current insurance products are not meeting the needs of cotton producers, or it could be that producers are simply unwilling to pay insurance premiums. In order to better understand the different crop insurance policies, the effects of multiple-peril crop insurance and crop revenue coverage on the net returns of the producer needed to be analyzed. The general objective of this study was to develop an empirical means and illustrate its application in evaluating the cost effectiveness of various crop and revenue insurance products as risk management tools for cotton producers in selected regions of Texas. The current study utilized the procedure developed by Ramirez (1997) and expanded by Ramirez (1999) to estimate and simulate cotton yield and price distributions. The simulated yield and price series obtained from these procedures were used to develop an empirical procedure to analyze the cost effectiveness of alternative crop insurance products in terms of increasing producer net returns and minimizing variation in net returns. This procedure was then illustrated using a regional level analysis to represent an overall comparison of crop and revenue insurance products and a farm level analysis to compare crop and revenue insurance products for an individual producer.Item Maximizing yield of high quality cottonseed through nutrient management strategies(Texas Tech University, 2000-05) Allen, Dale P.One of the primary challenges confronting the cottonseed industry is being able to produce superior quality seed with the ability to emerge rapidly from the soil and establish normal healthy plants. Early emerging seedlings from high quality seed are the most competitive and establish the greatest yield potential. Generally, seed formed in the lower fruiting branches produce seed of higher quality than seed from the upper fruiting branches. Stripper cotton is unique to the High Plains of Texas; therefore the seed planted are produced on the Plains. The short growing season of the High Plains causes the seed from the upper canopy bolls to suffer from increased competition from other developing bolls, an aging canopy, and cooler temperatures during development. Following the availability of an adequate water supply, growing season length and nutrient supply become the next major limiting factors to cotton production on the Texas High Plains. The prevailing temperatures provide marginal heat unit accumulation during the early and latter parts of the growing season. The cool temperatures in September and October limit the maturation of both the seed and fiber of bolls resulting from flowers in mid-August. The nutrient supply, largely controlled by the producer, represents the final limitation to production of cotton on the High Plains. Nutrient management can affect rate of crop maturity as well as water use efficiency. More efficient nutrient management strategies, particularly N and P, are needed to maximize seed production as governed by water supply and heat unit accumulation. The soil conditions on the Southern High Plains result in very low quantities of soluble P available to the growing plants (high soil pH, >7.6, and high quantities of CaCOs).Item Non-insect related sticky cotton(Texas Tech University, 1997-05) Hague, Steven S.Fibers from cotton {Gossypium spp.) may detrimentally adhere to textile processing machinery for a variety of reasons including stickiness. One of the most common causes of stickiness is sugar accumulation on the fiber. Honeydew excretion by whiteflies and aphids is one of the most common causes of sticky cotton worldwide. Since cotton fields on the High Plains are generally not infested by large populations of whiteflies, and aphid populations are sporadic, stickiness from honeydew is usually not a cause of stickiness. Other sources of stickiness may be sugars directly from the plant. In addition, seed coat fragments have been known to cause sticking problems at textile mills. Cotton fibers which stick during textile processing are a costly problem for the growers, gins, and textile mills. Texas' cotton growers once produced fibers that were weak and short, resulting in large monetary discounts at the marketplace (12). With the development and utilization of cultivars with improved quality and the use of HVI (highvolume instrumentation) for accurate quality determinations, the inferior fiber discounts have been less common (12). The much improved West Texas fiber and the concomitantly improved reputation is now threatened by sticky cotton. Unfortunately there is no test incorporated into HVI to measure cotton's propensity to be sticky. Unless extraordinary measures are used, sticky bales of cotton are generally not detected until the textile mills begin using them and the damage is done. Even in regions with severe stickiness, most of the cotton is not contaminated, however the entire crop is often thought of as "sticky" (11). Therefore, regional growers may suffer significant economic loss even if their specific cotton is not sticky. It is estimated that a cotton crop labeled as "sticky" is discounted by 5-10% (11) . Identification and elimination of sticky cotton is vital to the reputation of West Texas cotton.Item Relationships between rainfall, temperature, and dryland cotton production(Texas Tech University, 1997-08) Miller, Joel K.A 25-year database including daily temperatures and precipitation is analyzed for distributions, variations, trends and predictability for 17 counties on the Southern High Plains (SHP). Both minimum and maximum temperatures increase from north to south. However, diurnal temperature spread is distributed in a distinctly west to east fashion: a greater spread is noted in the west than in the eastern counties. In this region of interest, precipitation in terms of volume exhibits uniformity within the central and Southern counties. In the northern counties precipitation increases from west to east. As expected with a data set of this size, no precipitation or temperature trends are noted. A logarithmic distribution is shown to provide a primitive fit to wet-day and dry-day spells. Finally, Markov chain and gamma distribution models are used to describe and predict regional precipitation.Item Response of cotton grown on the South Plains of Texas to four levels of boron: and to magnesium, with and without nitrogen, phosphorus and potassium(Texas Tech University, 1963-06) Daniel, Delmar LNot availableItem Response of cotton grown on the South Plains of Texas to four levels of boron: and to magnesium, with and without nitrogen, phosphorus and potassium(Texas Tech University, 1963-06) Daniel, Delmar LNot availableItem The effect of cotton plant population on certain characteristics associated with stripper efficiency(Texas Tech University, 1952-05) Ray, Levon LNot availableItem The effect of multiple applications of T.I.B.A. (2,3,5-triiodobenzoic acid) on stormproof and non-stormproof cotton yields(Texas Tech University, 1971-12) Freytag, Arthur H.Not availableItem The Effect of Night Temperature on the Accumulation of Sugars in the Developing Cotton Boll(Texas Tech University, 1971-12) Conner, John WilliamNot Available.Item The effect of population density on certain agronomic and morphological characteristics of cotton(Texas Tech University, 1966-08) Fowler, James LowellNot availableItem The effect of timing of a single summer irigation on yield and fiber properties of four stormproof cotton varieties of different maturity(Texas Tech University, 1966-08) Gunter, Billy C.Not available