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	Provedor de dados AgEcon (1) Autor Babcock, Bruce A. (1) Breidt, F. Jay (1) Pautsch, Gregory R. (1) Palavra-chave Estimation risk (1) Geostatistics (1) Nitrogen fertilizer (1) Optimal sample sizes (1) Precision farming (1) Research Methods/ Statistical Methods (1) Single rate technology (1) Variable rate technology (1) Variogram (1) Mais... Tipo do documento Conference Paper or Presentation (1) Ano 1999 (1) País United States (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última 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 Registros recuperados: 1 Primeira ... 1 ... Última

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