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	Provedor de dados AgEcon (5) Autor Brorsen, B. Wade (5) Raun, William R. (5) Solie, John B. (5) Biermacher, Jon T. (2) Boyer, Christopher N. (2) Epplin, Francis M. (2) Arnall, D. Brian (1) Roberts, David C. (1) Stone, Marvin L. (1) Mais... Palavra-chave Crop Production/Industries (4) Wheat (3) Nitrogen use efficiency (2) Profitability (2) Farm Management (1) Linear stochastic plateau (1) Nitrogen seeds (1) Optical reflectance sensing (1) Precision agriculture (1) Production Economics (1) Research and Development/Tech Change/Emerging Technologies (1) Variable rate application (1) Mais... Tipo do documento Conference Paper or Presentation (5) Ano 2010 (2) 2008 (1) 2006 (1) 2005 (1) País United States (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Economics of Pre-Plant, Topdress, and Variable Rate Nitrogen Application in Winter Wheat AgEcon 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 Maximum Value of a Precise Nitrogen Application System for Wheat AgEcon 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 Nitrogen Fertilization of Growing Wheat Based upon Site-Specific Optical Sensing AgEcon 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 Profitability of Conventional vs. Variable Rate Nitrogen Application in Wheat Production AgEcon 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 Value of Regional Annual Nitrogen Needs Information for Wheat Producers in Oklahoma AgEcon 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 Registros recuperados: 5 Primeira ... 1 ... Última

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