Download or read book Optimization of Row Spacing and Nitrogen Fertilization for Cotton written by Ernest Leslie Clawson and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-narrow row (UNR) cotton (Gossypium hirsutum L.) is a production system using high plant populations in reduced row spacings. The responses of this production system to nitrogen fertilizer have not been fully investigated. Evaluations of yield and earliness of harvest are also important. A three-year study was conducted at the Texas Agricultural Experiment Station farm, Burleson County, TX, on a Ships clay (very-fine, mixed, active, thermic Chromic Hapluderts) and a Weswood silty clay loam (fine-silty, mixed, superactive, thermic Udifluventic Haplustepts). A split plot design was used. Nitrogen fertilizer rates of 0, 50, 101, and 151 kg N ha−1 were applied as the whole plots and row spacings of 19, 38, and 76 cm were established as the split plots. Data included lint yield and yield components, as well as earliness of crop maturity and earliness-related parameters such as boll distribution. Lint yield was increased by higher nitrogen rate. There was no nitrogen rate by row spacing interaction on lint yield, implying fertilizer rates do not need to be changed for UNR systems. Reductions in row spacing did not significantly affect lint yield in any year. Responses such as reduced bolls per plant, increased plant populations, increased ginout, and decreased boll size were often significant and combined to allow the crop to maintain equivalent yields as row spacings were reduced. The slight UNR earliness advantages were probably due to changes in boll distribution. Based on these results, increases in lint yield and earliness may not reliably contribute to the profitability of UNR cotton.
Download or read book Row Spacing and Nitrogen Rates for Cotton written by Perrin Holmes Grissom and published by . This book was released on 1963 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Treatments Row Spacing and Plant Population Effects on Cotton Yields Plants and Fiber Characteristics written by Stephen Esah Koli and published by . This book was released on 1975 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Analysis of Nitrogen Optimization and Price Variation in Cotton Production written by TraeAnn Lynette Schlemmer and published by . This book was released on 2013 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cotton production is a critical portion of Texas agriculture and the statewide economy. Optimizing input quantities, especially nitrogen, is necessary to maximize profit and production efficiency. Using National Agricultural Statistics Service data for Texas District 1 South, various functional forms were constructed and analyzed, disclosing that the square root model was most accurate. These models estimated yield under various nitrogen application rates, finding that current nitrogen levels are below optimal. Additionally, volatility and variance of cotton futures returns were analyzed under several models, including GARCH specifications. These models revealed high persistence and leverage effects in cotton returns. After evaluating models for precision, the GARCH (1, 1) model had the highest degree of accuracy.
Download or read book Effects of Row Spacing and Rates of Added Nitrogen on Yield and Growth of Several Varieties of Cotton Gossypium Hirsutum L written by Noell Kent Rogers and published by . This book was released on 1973 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Treatments Row Spacing and Plant Populaton Effects on Cotton Yelds Plant and Fiber Characteristics written by S. E. Koli and published by . This book was released on 1975 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Row Widths and Nitrogen Fertilization for Cotton Production written by Abdou Kasso and published by . This book was released on 1976 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Treatments Row Spacing and Plant Population Effects on Cotton Yields Plant and Fiber Characteristics written by S. E. Koll and published by . This book was released on 1975 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spacing,effects; Plant population effects; Nitrogen effect; Field plat technique; Plant analyses Characteristics measured; Plant Characteristcs; Observation trial- 1975; Additional experimentation in 1974.
Download or read book Cotton Production Manual written by S. Johnson Hake and published by University of California, Agriculture and Natural Resources. This book was released on 1996 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cotton Production Manual was written for growers everywhere who strive to improve cotton quality and productivity. Features a season-by season production calendar with pest and disease control, fertilization, and irrigation tips and a Diagnostic Guide to help you identify crop problems in the field with management options. 12 pages of color plates.
Download or read book Foliar and Soil Applications of Nitrogen for Cotton During the Growing Season written by Bruce Louis Ahrendsen and published by . This book was released on 1991 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomics of Cotton Grown on a 38 cm Row Spacing in North Carolina written by Gary Stephen Hamm and published by . This book was released on 2009 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: planting date, double crop, defoliation, plant growth regulator, nitrogen, 38-cm, cotton, narrow-row.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 1296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1989 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomics of Cotton Grown on a 38 cm Row Spacing in North Carolina written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract HAMM, GARY STEPHEN. Agronomics of Cotton Grown on a 38-cm Row Spacing in North Carolina (Under the direction of Dr. Keith Edmisten). Cotton (Gossypium hirsutum) planted in a 38-cm row configuration is an innovative idea that has come about in the past few years. There has been some interest in narrow-row cotton due to the availability of a new harvester capable of harvesting cotton on 38-cm rows. Producers have raised questions regarding changing their cotton production strategies in order to maximize yield potential for cotton grown on 38-cm rows. Agronomic practices that allow for maximum yield potential have yet to be determined for narrow-row cotton. Four separate field experiments were conducted in 2005, 2006 and 2007 at Upper Coastal Plains Research Station, near Rocky Mount, NC, Central Crops Research Station, Clayton, NC, and Duplin County, NC in order to define these agronomic practices. Cotton was planted on 38-cm row spacings using a vacuum planter. One experiment was conducted to observe the effects of seven nitrogen rates ranging from 0-196 kg N ha-1 on yield potential, plant uptake of nitrogen, growth habits, fiber quality, and economic returns of narrow-row cotton. The second experiment was conducted to look at the effects of fourteen different application methods on plant height control, yield, and fiber quality. The strategies consisted of making applications to narrow-row cotton at certain growth stages with different rates of mepiquat pentaborate. The third experiment consisted of making a herbicidal defoliation application to narrow-cotton at six different percent open boll stages ranging from 0-100 % open bolls to determine yield and fiber quality parameters. The fourth experiment was conducted to determine if narrow-row cotton could be planted in a double crop situation with wheat which is an uncommon practice in NC. For this experiment, narrow-row cotton was planted in comparison with wide-row cotton for yield and economic potential a.
Download or read book Methods of Studying Root Systems written by W. Böhm and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Root research under natural field conditions is still a step-child of science. The reason for this is primarily methodological. The known methods are tedious, time consuming, and the accuracy of their results is often not very great. Many research workers have been discouraged by doing such root studies. The need for more information on the development and distribution of plant roots in different soils under various ecological conditions is, however, obvious in many ecological disciplines. Especially the applied botanical sciences such as agriculture, horticulture, and forestry are interested in obtaining more data on plant roots in the soil. This book will give a survey of existing methods in ecological root research. Primarily field methods are presented; techniques for pot experiments are described only so far as they are important for solving ecological problems. Laboratory methods for studying root physiology are not covered in this book. Scientific publications on roots are scattered in many different journals published all over the world. By working through the international root literature I found that about ten thousand papers on root ecology have been published at the present. This is not very much compared with the immense literature on the aboveground parts of the plants, but is, however, too much to cite in this book.
Download or read book Water Resources Research Catalog written by and published by . This book was released on 1966 with total page 1464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
