Consulta: creatorFacets:"Solie,   John B."
Registros recuperados: 7
Data/hora: 13/06/2024 13:25:44

Maximum Value of a Precise Nitrogen Application System for Wheat
Provedor de dados: 31
Autores: Biermacher,   Jon T.; Epplin,   Francis M.; Brorsen,   B. Wade; Solie,   John B.; Raun,   William R.
Research is ongoing to develop sensor-based systems to determine crop nitrogen needs.  The objective is to determine the expected maximum value of an in season precision nitrogen application system for winter wheat.  Farmers could not afford to pay much more than $9 per acre for a precision system.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/35391

The Value of Regional Annual Nitrogen Needs Information for Wheat Producers in Oklahoma
Provedor de dados: 31
Autores: Roberts,   David C.; Brorsen,   B. Wade; Raun,   William R.; Solie,   John B.
Crop producers are increasingly interested in reducing nitrogen use without sacrificing yield. Technology is available for precise application at the sub-field level, but adoption has been sluggish. This paper estimates the relative profitability of a field level annual predictor of mid-season N requirements and a regional predictor of the same.
Tipo: Conference Paper or Presentation
Palavras-chave: Nitrogen seeds; Nitrogen use efficiency; Precision agriculture; Wheat; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/6734

Precision Nitrogen Fertilization Technology with Micro Grids
Provedor de dados: 31
Autores: Biermacher,   Jon T.; Epplin,   Francis M.; Brorsen,   B. Wade; Solie,   John B.; Raun,   Bill.
Sensor-based precision fertilizer technologies are being developed and researched by production scientists.  One such technology uses normalized difference vegetation index (NDVI) reflectance measurements of growing winter wheat plants and a nitrogen fertilizer optimization algorithm (NFOA) to determine nitrogen requirement necessary for plants to reach their yield plateau.  A number of precision fertilizer application systems that use this technology are considered in this paper.  A linear response stochastic plateau wheat yield function conditional on NDVI reflectance measurements is estimated and used within an expected profit-maximization framework to estimate upper bounds on the returns from the precision nitrogen application systems.  The on-the-go...
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/21046

Profitability of Conventional vs. Variable Rate Nitrogen Application in Wheat Production
Provedor de dados: 31
Autores: Boyer,   Christopher N.; Brorsen,   B. Wade; Solie,   John B.; Raun,   William R.
A variable rate nitrogen applicator based on optical reflectance measurements was developed to increase profits in wheat production by reducing the cost of production or by increasing grain yield. This paper determines if yields and profits from the variable rate treatments are significantly different from the conventional treatments.
Tipo: Conference Paper or Presentation
Palavras-chave: Profitability; Variable rate application; Optical reflectance sensing; Wheat; Farm Management; Production Economics.
Ano: 2010
URL: http://purl.umn.edu/56405

THE IMPACT OF PRECISION FARMING STRATEGIES ON PROFITABILITY
Provedor de dados: 31
Autores: Solie,   John B.
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/33416

Nitrogen Fertilization of Growing Wheat Based upon Site-Specific Optical Sensing
Provedor de dados: 31
Autores: Biermacher,   Jon T.; Epplin,   Francis M.; Solie,   John B.; Raun,   William R.; Brorsen,   B. Wade; Stone,   Marvin L.
A site-specific fertilizer application system that uses optical reflectance measurements of growing plants to estimate fertilizer requirements and that can apply liquid nitrogen fertilizer at a grid level of four square feet is under development.  The objective is to determine if the site-specific system is more economical than alternative systems.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/35507

Economics of Pre-Plant, Topdress, and Variable Rate Nitrogen Application in Winter Wheat
Provedor de dados: 31
Autores: Boyer,   Christopher N.; Brorsen,   B. Wade; Solie,   John B.; Arnall,   D. Brian; Raun,   William R.
Past research about the efficiency of nitrogen application in winter wheat (Triticum aestivum L.) based on source and timing has produced inconsistent results. The majority of the literature used data from few locations over short time periods. This study used a unique data set of yields and nitrogen quantities from 2002-2009 at ten different locations in Oklahoma, USA. The objective of this research was to determine wheat yield response for granular pre-plant, uniform foliar topdress, and variable rate foliar topdress. Topdress liquid nitrogen had a 19% higher NUE than pre-plant urea, and was the most profitable source of nitrogen.
Tipo: Conference Paper or Presentation
Palavras-chave: Linear stochastic plateau; Nitrogen use efficiency; Profitability; Wheat; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/61153