How Do Precipitation and Irrigated Ratio Interactively Impact Corn Yield?
Author(s)
Cai, Ruohong
Bergstrom, John C.
Mullen, Jeffrey D.
Shurley, Don
Wetzstein, Michael
Advisor(s)
Editor(s)
Carroll, G. Denise
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Abstract
In this research, an econometric model has been constructed and estimated to study the relationship between precipitation, irrigated ratio and crop yield. The model was based on the weather and yield data in the southwest part of the State of Georgia. The econometric model includes three sets of explanatory variables: principal components of temperature and precipitation, precipitation distribution index (PDI) and de-trended irrigated ratio. The estimated results showed that de-trended irrigated ratio is significant in almost all of the models. PDI also helps improve the goodness-of-fit of the model. However, PDI is not highly correlated to de-trended irrigated ratio as expected. An explanation for this could be that Georgia irrigated ratio is still low and farmers’ response to weather change is slow.
Sponsor
Sponsored by:
Georgia Environmental Protection Division
U.S. Geological Survey, Georgia Water Science Center
U.S. Department of Agriculture, Natural Resources Conservation Service
Georgia Institute of Technology, Georgia Water Resources Institute
The University of Georgia, Water Resources Faculty
Date
2011-04
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Resource Type
Text
Resource Subtype
Proceedings