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	Provedor de dados AgEcon (9) Autor Mahajanashetti, S.B. (9) English, Burton C. (5) Roberts, Roland K. (5) Basavaraja, H. (4) Acharya, Saraswati Poudel (1) Angadi, V.V. (1) Bhat, Anil R.S. (1) Havaldar, Y.N. (1) Hugar, A.Y. (1) Kunnal, L.B. (1) Larson, James A. (1) Rajkumar, P.K. (1) Rao, B. Dayakar (1) Tyler, Donald D. (1) Udagatti, Naveen C. (1) Vijayakumar, H.S. (1) Mais... Palavra-chave Precision farming (5) Spatial variability (4) Crop Production/Industries (3) Nitrogen (3) Agricultural and Food Policy (2) Corn (2) Management zones (2) Meta-response functions (2) Nitrogen restriction (2) Resource /Energy Economics and Policy (2) Site-specific farming (2) Site-specific management (2) Spatial break-even variability proportions (2) Yield response variability (2) Composite entropy index (1) Crop diversification (1) Crop growth simulation model (1) EPIC (1) Environment (1) Environmental Economics and Policy (1) Mais... Tipo do documento Journal Article (6) Conference Paper or Presentation (2) Article (1) Ano 2011 (1) 2008 (1) 2007 (1) 2005 (1) 2002 (1) 2001 (1) 2000 (1) 1999 (2) Mais... País United States (9) Idioma Inglês (9)		Registro completo Provedor de dados:  AgEcon País:  United States Título:  VARIABLE RATE NITROGEN APPLICATION ON CORN FIELDS: THE ROLE OF SPATIAL VARIABILITY AND WEATHER Autores:  Roberts, Roland K. Mahajanashetti, S.B. English, Burton C. Larson, James A. Tyler, Donald D. Data:  2005-06-27 Ano:  2002 Palavras-chave:  Corn Environment Meta-response functions Nitrogen restriction Precision farming Site-specific management Spatial variability Weather variability Crop Production/Industries Resumo:  Meta-response functions for corn yields and nitrogen losses were estimated from EPIC-generated data for three soil types and three weather scenarios. These metamodels were used to evaluate variable rate (VRT) versus uniform rate (URT) nitrogen application technologies for alternative weather scenarios and policy option. Except under very dry conditions, returns per acre for VRT were higher than for URT and the economic advantage of VRT increased as realized rainfall decreased from expected average rainfall. Nitrogen losses to the environment from VRT were lower for all situation examined, except on fields with little spatial variability. Tipo:  Journal Article Idioma:  Inglês Identificador:  16766 http://purl.umn.edu/15512 Editor:  AgEcon Search Relação:  Journal of Agricultural and Applied Economics>Volume 34, Number 01, April 2002 Formato:  19 application/pdf Fechar

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