Author: Ernest Leslie Clawson
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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.
Optimization of Row Spacing and Nitrogen Fertilization for Cotton
Author: Ernest Leslie Clawson
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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.
Row Spacing and Nitrogen Rates for Cotton
Author: Perrin Holmes Grissom
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 2
Book Description
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 2
Book Description
Nitrogen Treatments, Row Spacing, and Plant Population Effects on Cotton Yields, Plants, and Fiber Characteristics
Author: Stephen Esah Koli
Publisher:
ISBN:
Category :
Languages : en
Pages : 150
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 150
Book Description
The Analysis of Nitrogen Optimization and Price Variation in Cotton Production
Author: TraeAnn Lynette Schlemmer
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 152
Book Description
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.
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 152
Book Description
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.
Effects of Row Spacing and Rates of Added Nitrogen on Yield and Growth of Several Varieties of Cotton, (Gossypium Hirsutum L.).
Author: Noell Kent Rogers
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 170
Book Description
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 170
Book Description
Nitrogen Treatments, Row Spacing and Plant Populaton Effects on Cotton Yelds, Plant, and Fiber Characteristics
Author: S. E. Koli
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
Book Description
Evaluation of Row Widths and Nitrogen Fertilization for Cotton Production
Author: Abdou Kasso
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Nitrogen Treatments, Row Spacing, and Plant Population Effects on Cotton Yields, Plant, and Fiber Characteristics
Author: S. E. Koll
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Spacing,effects; Plant population effects; Nitrogen effect; Field plat technique; Plant analyses Characteristics measured; Plant Characteristcs; Observation trial- 1975; Additional experimentation in 1974.
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Spacing,effects; Plant population effects; Nitrogen effect; Field plat technique; Plant analyses Characteristics measured; Plant Characteristcs; Observation trial- 1975; Additional experimentation in 1974.
Foliar and Soil Applications of Nitrogen for Cotton During the Growing Season
Author: Bruce Louis Ahrendsen
Publisher:
ISBN:
Category : Agricultural credit
Languages : en
Pages : 408
Book Description
Publisher:
ISBN:
Category : Agricultural credit
Languages : en
Pages : 408
Book Description
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 788
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 788
Book Description