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Provedor de dados:  AgEcon
País:  United States
Título:  The Law of the Minimum and Sources of Nonzero Skewness for Crop Yield Distributions
Autores:  Tumusiime, Emmanuel
Brorsen, B. Wade
Boyer, Christopher N.
Data:  2011-01-14
Ano:  2011
Palavras-chave:  Linear plateau model
Non-normal distributions
Yield distribution
Production Economics
Risk and Uncertainty
Resumo:  Crop yields are not commonly found to be normally distributed, but the cause of the non-normal distribution is unclear. The non-normality might be due to weather variables and/or an underlying von Liebig law of the minimum (LoM) production function. Our objective is to determine the degree to which an underlying linear response stochastic plateau production function can explain the skewness of Oklahoma wheat yields at varied nitrogen rates. We use farm-level wheat data from a long-term experiment in Oklahoma, which is a unique data set to the literature. The Tembo et al. (2008) production function provides negative skewness at all levels of nitrogen with skewness near zero for both very high and very low levels of nitrogen. Observed skewness for wheat yields, however, is positive. The variation in the plateau by year shows positive skewness. Skewness in yield potential related to weather should be considered as a possible explanation of skewness.
Tipo:  Conference Paper or Presentation
Idioma:  Inglês
Relação:  Southern Agricultural Economics Association>2011 Annual Meeting, February 5-8, 2011, Corpus Christi, Texas
Formato:  18

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