Download or read book Effect of an Upper Temperature Threshold on Heat Unit Calculations Defoliation Timing Lint Yield and Fiber Quality in Cotton written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Effect of an upper temperature threshold on heat unit calculations, defoliation timing, lint yield, and fiber quality in cotton.
Download or read book Effect of an Upper Temperature Threshold on Heat Unit Calculations Defoliation Timing Lint Yield and Fiber Quality in Cotton written by Daniel D. Fromme and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Crop managers need to determine the most profitable time to defoliate cotton (Gossypium hirsutum L.) in a high rainfall environment such as the coastal region of Texas. In cotton production, delaying defoliation exposes open bolls to a higher probability of rainfall, and thus, reduces lint yield and fiber quality. Premature defoliation, however, has detrimental affects on lint yield and fiber quality. A more recent method to determine defoliation is based on heat-unit (HU or DD15) accumulation after physiological cutout or five nodes above white flower (NAWF=5). Results have been inconsistent across a wide range of field environments when utilizing HU accumulation past cutout; therefore, adoption of this method has been limited. Many regions of the Cotton Belt have maximum day time temperatures during the growing season that are above optimum for maximum growth. Field studies were conducted for three consecutive growing seasons in the Brazos River Valley and Upper Gulf Coast regions of Texas. The purpose of this research was to identify an upper temperature threshold (UTT) for calculating degree days for defoliation timing. The experimental design consisted of a split-plot design with four replications. The main plots consisted of three upper temperature thresholds (32°C, 35°C, and no upper limit) and the subplots were five HU timings (361, 417, 472, 528, and 583) accumulated from date of cutout. Utilizing an UTT to calculate daily HU failed to explain differences in the optimum time to defoliate based on accumulated HU from cutout for the upper thresholds investigated. Accumulated HU had a significant impact, however, on defoliation timing. Comparison of the two locations showed that maximum lint yield was obtained at 472 HU and 52% open boll at Wharton County versus a maximum of 528 HU and 62% open boll for the Burleson County location. Employing the NACB=4 method to time defoliation at both locations would have resulted in premature application of harvest aids and reduced lint yields. No differences were observed in adjusted gross income values at Wharton County among the 417, 472, 528, and 583 HU treatments. For Burleson County, adjusted gross income peaked in value at 528 HU.
Download or read book Effect of Cotton Defoliation on Yield and Quality written by and published by . This book was released on 1961 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Cotton Defoliation on Yield and Quality written by and published by . This book was released on 1961 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Unit Accumulation to Determine Boll Maturity and the Impact Upon Fiber Properties and Lint Yield of Cotton written by Ty Kelly Witten and published by . This book was released on 2003 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary Proceedings of the Beltwide Cotton Production Mechanization Conference written by and published by . This book was released on 1985 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy Abstracts written by and published by . This book was released on 1973 with total page 610 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 2003 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cotton Physiology written by Jack R. Mauney and published by . This book was released on 1986 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sticky Cotton written by Eric F. Hequet and published by Texas Tech University Press. This book was released on 2006 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential reference for anyone searching for ways to avoid or mitigate the problem of cotton stickiness.
Download or read book Nodes Above White Flower and Heat Units as Indicators of Harvest Aid Timing written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The timing of harvest aid application on cotton (Gossypium hirsutum L.) is critical, and poses potential problems when mistimed. The consequences of premature harvest aid application could result in reduced profit to the grower through the need for additional applications, reduced lint yield, poor fiber quality, and/or delayed harvest. A delayed application of harvest aid materials may also reduce lint yield and fiber quality if late season inclement weather patterns are established. Currently, there are many methods utilized for determining application of harvest aid materials. One method utilizes accumulated heat units, or growing degree days (HUor DD60's), following plant physiological maturity. Physiological maturity (cutout) is identified as nodes above white flower equals 5 (NAWF=5). This method triggers the application of harvest aid chemicals when 850 HU have been accumulated beyond cutout. Due to differing environmental and edaphic characteristics across the CottonBelt, application of harvest aid chemicals at this time may be premature in terms of optimizing lint yield and fiber quality. A two-year study was established to determine the proper timing of harvest aid application for picker harvested cotton in south central Texas. The design utilized a split-plot with four replications. The main plots consisted of three nodal positions (NAWF=3, 4, and 5), and the subplots were five HU accumulations (650, 750, 850, 950,and 1050) that corresponded to each of the nodal positions. In both years, lint yields increased with an increase in HU accumulation. Greater yields were achieved when HUaccumulation was initiated after NAWF = 4. This two-year study indicates that harvest aid applications made at NAWF = 4 plus 1050 HU would optimize yield potential for picker harvested cotton in south central Texas.
Download or read book Effects of Defoliation Plant Maturity and Ginning Setup on Cotton Quality and Value in the Midsouth Classic Reprint written by Gary L. Barker and published by Forgotten Books. This book was released on 2018-09-10 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Effects of Defoliation, Plant Maturity, and Ginning Setup on Cotton Quality and Value in the Midsouth Porter and others (9) indicated that some of the advantages resulting from defoliation are higher harvesting efficiency, increased picking time per day, retardation of crop deterioration, reduction of insect population in the crop, and reduction of lint stain and trash content. They also gave some general tips concerning the ap plication of a defoliant. Thomas and Williamson (13) found that early and intermediate defoliation appeared to lower the fiber as judged by length, strength, Micro naire, and similar measurements and quantity of the crop harvested by the picker. Defoliation also tended to improve grade. Riley and Williamson (10) compared weather parameters in defoliated and untreated fields. They discovered that the relative humidity re mained at less than 50 percent for about an hour longer after sunrise in a defoliated field; these measurements indicate that defoliated cotton fields are drier in the daytime during the time of picking. They also found that the maximum temperature before frost averaged almost 5° F higher in the defoliated field and the minimum temperature 1° F lower. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Crop Physiology Case Histories for Major Crops written by Victor Sadras and published by Academic Press. This book was released on 2020-12-05 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crop Physiology: Case Histories of Major Crops updates the physiology of broad-acre crops with a focus on the genetic, environmental and management drivers of development, capture and efficiency in the use of radiation, water and nutrients, the formation of yield and aspects of quality. These physiological process are presented in a double context of challenges and solutions. The challenges to increase plant-based food, fodder, fiber and energy against the backdrop of population increase, climate change, dietary choices and declining public funding for research and development in agriculture are unprecedented and urgent. The proximal technological solutions to these challenges are genetic improvement and agronomy. Hence, the premise of the book is that crop physiology is most valuable when it engages meaningfully with breeding and agronomy. With contributions from 92 leading scientists from around the world, each chapter deals with a crop: maize, rice, wheat, barley, sorghum and oat; quinoa; soybean, field pea, chickpea, peanut, common bean, lentil, lupin and faba bean; sunflower and canola; potato, cassava, sugar beet and sugarcane; and cotton. A crop-based approach to crop physiology in a G x E x M context Captures the perspectives of global experts on 22 crops
Download or read book Physiology of Cotton written by James McD. Stewart and published by Springer Science & Business Media. This book was released on 2009-11-04 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cotton production today is not to be undertaken frivolously if one expects to profit by its production. If cotton production is to be sustainable and produced profitably, it is essential to be knowledgeable about the growth and development of the cotton plant and in the adaptation of cultivars to the region as well as the technology available. In addition, those individuals involved in growing cotton should be familiar with the use of management aids to know the most profitable time to irrigate, apply plant growth regulators, herbicides, foliar fertilizers, insecticides, defoliants, etc. The chapters in this book were assembled to provide those dealing with the production of cotton with the basic knowledge of the physiology of the plant required to manage the cotton crop in a profitable manner.
Download or read book Cottonseed Quality written by and published by . This book was released on 1970 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cotton Facts written by M. Rafiq Chaudhry and published by . This book was released on 2003 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
