期刊
AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS
卷 86, 期 3, 页码 675-687出版社
WILEY
DOI: 10.1111/j.0002-9092.2004.00610.x
关键词
Argentina; corn; precision agriculture; site-specific nitrogen management; spatial auto-correlation; spatial econometrics; variable rate
The objective of this study is to determine the potential for using spatial econometric analysis of combine yield monitor data to estimate the site-specific crop response functions. The specific case study is for site-specific nitrogen (N) application to corn production in Argentina. Spatial structure of the yield data is modeled with landscape variables, spatially autoregressive error and groupwise heteroskedasticity. Results suggest that N response differs by landscape position, and that site-specific application may be modestly profitable. Profitability depends on the model specification used, with all spatial models consistently indicating profitability, whereas the nonspatial models do not.
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