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	Provedor de dados AgEcon (3) Autor Maine, Ntsikane (3) Nell, Wilhelm T. (3) Alemu, Zerihun Gudeta (1) Groenewald, Jan A. (1) Hough, Ella Christina (1) Lowenberg-DeBoer, James (1) van der Rijst, M. (1) Mais... Palavra-chave Crop Production/Industries (3) Precision agriculture (3) South Africa (2) Best fit model selection (1) Farming (1) Farming success (1) Fertilizer (1) Precision farming (1) Profitability (1) Research and Development/Tech Change/Emerging Technologies (1) Restricted maximum-likelihood model (RELM) (1) Single rate phosphate application (1) Site-specific phosphorus management (1) Spatial differences (1) Spatial regression (1) Strategic approach (1) Variable-rate application (1) Variable-rate phosphate application (1) Yield response (1) Mais... Tipo do documento Journal Article (2) Conference Paper or Presentation (1) Ano 2010 (1) 2007 (1) 2005 (1) País United States (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Best fit model selection for spatial differences (regression) in the profitability analysis of precision phosphate (P) application to winter cereals in Precision Agriculture (PA) AgEcon Hough, Ella Christina; Nell, Wilhelm T.; Maine, Ntsikane; Groenewald, Jan A.; van der Rijst, M.. Phosphates (P) are an important nutrient required by every living plant and animal cell, and deficiencies in soils could cause limited crop production, thereby reducing profitability. Phosphates are also a primary nutrient essential for root development and crop production, and are needed in the tissues of a plant where cells rapidly divide and enlarge. Precision agriculture (PA) could assist the farmer in applying the correct amount of P to the part of the field where it is required most. Variable rate technology (VRT) is a potential tool that can help with the development of strategies for phosphate fertilizer management. On-field trials were conducted on a commercial farm in the Western Cape Province; As many as five soil types occur on each field... Tipo: Journal Article Palavras-chave: Precision agriculture; Variable-rate phosphate application; Single rate phosphate application; Profitability; Spatial differences; Restricted maximum-likelihood model (RELM); Spatial regression; Best fit model selection; South Africa; Crop Production/Industries. Ano: 2010 URL: http://purl.umn.edu/96642 A Strategic Approach to the Implementation of Precision Agriculture Principles in Cash Crop Farming AgEcon Maine, Ntsikane; Nell, Wilhelm T.. Precision agriculture is one of the important agricultural technologies that can assist farmers and managers in promoting long-term success. Precision agriculture can help farm managers increase their management capacity, which is of utmost importance in the highly competitive modern agriculture. Increased yields and/or efficient input use can also be achieved with precision agriculture. Precision agriculture also involve a large capital outlay and requires skills in interpreting the masses of generated data. Modern farmers have to engage in pro-active thinking with regard to suitable agricultural systems that can enhance sustainable success of their farming businesses. Farm managers who are contemplating on getting involved in precision agriculture need... Tipo: Conference Paper or Presentation Palavras-chave: Precision agriculture; Strategic approach; Farming; Farming success; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies. Ano: 2005 URL: http://purl.umn.edu/24259 Economic Analysis of Phosphorus Applications under Variable and Single-Rate Applications in the Bothaville District AgEcon Maine, Ntsikane; Nell, Wilhelm T.; Lowenberg-DeBoer, James; Alemu, Zerihun Gudeta. Variable-rate (VR) application of inputs in South African cash crop production is mainly concerned with fertilizer and lime, and this indicates the importance of these inputs in cash crop production. However, the profitability of VR application of inputs has not yet been investigated under South African conditions. This paper studies the maize yield response to variable-rate application of phosphorus (P) and the profitability thereof in South Africa, on the basis of data collected on a 104-hectare experimental field on a farm in the Bothaville district. The strip-plot design of 180 strips was used for this on-farm research experiment. This design involved treatments that run in the same direction across the field as planting and harvesting. The objective... Tipo: Journal Article Palavras-chave: Precision agriculture; Precision farming; Site-specific phosphorus management; Variable-rate application; Fertilizer; Yield response; South Africa; Crop Production/Industries. Ano: 2007 URL: http://purl.umn.edu/7047 Registros recuperados: 3 Primeira ... 1 ... Última

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