Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados AgEcon (9) Autor Larson, James A. (9) Tyler, Donald D. (9) Roberts, Roland K. (7) English, Burton C. (5) Mooney, Daniel F. (4) Duck, Bob N. (2) Cochran, Rebecca L. (1) Dillivan, Kim D. (1) Jaenicke, Edward C. (1) Mahajanashetti, S.B. (1) Slinsky, Stephen P. (1) Mais... Palavra-chave Crop Production/Industries (7) Production Economics (3) Biomass (2) Cover crops (2) Farm Management (2) Nitrogen (2) Q42 (2) Tillage (2) Bioenergy (1) Bioenergy crops (1) Corn (1) Cotton (1) D20 (1) D21 (1) D81 (1) D86 (1) Dry matter loss (1) Energy Crops (1) Environment (1) Function form (1) Mais... Tipo do documento Conference Paper or Presentation (6) Journal Article (3) Ano 2010 (3) 2008 (1) 2005 (1) 2002 (1) 2001 (1) 1998 (1) 1997 (1) 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

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco