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	Provedor de dados AgEcon (5) Autor English, Burton C. (3) Roberts, Roland K. (3) Larson, James A. (2) Babcock, Bruce A. (1) Breidt, F. Jay (1) Bullock, David S. (1) Lambert, Dayton M. (1) Larkin, Sherry L. (1) Lowenberg-DeBoer, James (1) Mahajanashetti, S.B. (1) Marra, Michele C. (1) Martin, Steven W. (1) Mooney, Daniel F. (1) Pautsch, Gregory R. (1) Paxton, Kenneth W. (1) Reeves, Jeanne M. (1) Walton, Jonathan C. (1) Mais... Palavra-chave Variable rate technology (5) Farm Management (3) Q16 (3) Precision agriculture (2) Precision farming (2) Research and Development/Tech Change/Emerging Technologies (2) Site-specific management (2) Agribusiness (1) C31 (1) Capital budgeting (1) Community/Rural/Urban Development (1) Crop Production/Industries (1) D21 (1) Decision aid (1) Decision support (1) Estimation risk (1) Farm management (1) Geostatistics (1) Information technology (1) Land Economics/Use (1) Mais... Tipo do documento Conference Paper or Presentation (3) Journal Article (2) Ano 2010 (1) 2009 (1) 2006 (1) 2001 (1) 1999 (1) País United States (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última ASSESSING SPATIAL BREAK-EVEN VARIABILITY IN FIELDS WITH TWO OR MORE MANAGEMENT ZONES AgEcon English, Burton C.; Mahajanashetti, S.B.; Roberts, Roland K.. Farmers are interested in knowing whether applying inputs at variable rates across a field is economically viable. The answer depends on the crop, the input, their prices, the cost of variable rate technology (VRT) versus uninform rate technology (URT), and the spatial and yield response variability within each field. Methods were investigated for determining the range of spatial variability over which the return to VRT covers its additional cost compared with URT in fields with multiple management zones. Models developed in this article, or variants thereof, could be used to help farmers make the VRT adoption decision. Tipo: Journal Article Palavras-chave: Management zones; Nitrogen; Precision farming; Site-specific management; Spatial break-even variability proportions; Spatial variability; Variable rate technology; Yield response variability; Farm Management. Ano: 2001 URL: http://purl.umn.edu/15450 Economics of the Variable Rate Technology Investment Decision for Agricultural Sprayers AgEcon Mooney, Daniel F.; Larson, James A.; Roberts, Roland K.; English, Burton C.. Producers lack information about the profitability of variable rate technology (VRT) for agricultural sprayers. An economic framework was developed to evaluate the returns required to pay for VRT investments. Payback variables included input savings, yield gains, and reduced application costs. We illustrate the framework with two example investment scenarios. Tipo: Conference Paper or Presentation Palavras-chave: Capital budgeting; Decision aid; Farm management; Precision agriculture; Map-based; Sensor-based; Site-specific management; Variable rate technology; Farm Management; Q10; Q16. Ano: 2009 URL: http://purl.umn.edu/46860 Factors Influencing Farmer Adoption of Portable Computers for Site-Specific Management: A Case Study for Cotton Production AgEcon Walton, Jonathan C.; Larson, James A.; Roberts, Roland K.; Lambert, Dayton M.; English, Burton C.; Larkin, Sherry L.; Marra, Michele C.; Martin, Steven W.; Paxton, Kenneth W.; Reeves, Jeanne M.. Personal digital assistants (PDA) and handheld global positioning systems (GPS) have become increasingly important in cotton production but little is known about their use. This research analyzed the adoption of PDA/handheld GPS devices in cotton production. A younger farmer who used a computer in farm management and had a positive perception of Extension had a greater likelihood of adopting the devices. In addition, farmers who used complementary remote sensing, plant mapping, and grid soil sampling information were more likely to use PDA/handheld GPS devices. Finally, the COTMAN in-field decision support program from Extension also positively impacted adoption. Tipo: Journal Article Palavras-chave: Decision support; Information technology; Precision farming technology; Variable rate technology; Agribusiness; Community/Rural/Urban Development; Crop Production/Industries; Farm Management; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies; Teaching/Communication/Extension/Profession; D21; Q12; Q16. Ano: 2010 URL: http://purl.umn.edu/90671 Optimal Information Acquisition under a Geostatistical Model AgEcon Pautsch, Gregory R.; Babcock, Bruce A.; Breidt, F. Jay. Studies examining the value of switching to a variable rate technologies (VRT) fertilizer program assume producers possess perfect soil nitrate information. In reality, producers estimate soil nitrate levels with soil sampling. The value of switching to a VRT program depends on the quality of the estimates and on how the estimates are used. Larger sample sizes, increased spatial correlation, and decreased variability improve the estimates and increase returns. Fertilizing strictly to the estimated field map fails to account for estimation risk. Returns increase if the soil sample information is used in a Bayesian fashion to update the soil nitrate beliefs in non-sampled sites. Tipo: Conference Paper or Presentation Palavras-chave: Estimation risk; Geostatistics; Nitrogen fertilizer; Optimal sample sizes; Precision farming; Single rate technology; Variable rate technology; Variogram; Research Methods/ Statistical Methods. Ano: 1999 URL: http://purl.umn.edu/18358 Using Spatial Analysis to Study the Values of Variable Rate Technology and Information AgEcon Bullock, David S.; Lowenberg-DeBoer, James. We present a review of the last few years' literature on the economic feasibility of variable rate technology in agriculture. Much of the research on this topic has involved the estimation of site-specific yield response functions. Data used for such estimations most often inherently lend themselves to spatial analysis. We discuss the different types of spatial analyses that may be appropriate in estimating various types yield response functions. Then, we present a taxonomy for the discussion of the economics of precision agriculture technology and information. We argue that precision agriculture technology and information must be studied together since they are by nature economic complements. We contend that longer-term, multi-location agronomic... Tipo: Conference Paper or Presentation Palavras-chave: Precision agriculture; Spatial econometrics; Variable rate technology; Research and Development/Tech Change/Emerging Technologies; C31; O33; Q16. Ano: 2006 URL: http://purl.umn.edu/25393 Registros recuperados: 5 Primeira ... 1 ... Última

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