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| Title: | Are U.S. Corn and Soybeans Becoming More Drought Tolerant? |
| Authors: | Yu, Tian
Babcock, Bruce A. |
| Authors (Email): | Yu, Tian (yutian@iastate.edu)
Babcock, Bruce A. (babcock@iastate.edu) |
| Keywords: | corn
crop insurance rates
drought tolerance
soybean
yield risk |
| Issue Date: | 2009-10 |
| Series/Report no.: | CARD Working Paper
09-WP 500 |
| Abstract: | An objective drought index that measures the dry and hot conditions adversely affecting crop yields is used in a regression analysis to test whether corn and soybeans have become more drought tolerant. Results indicate that corn yield losses, whether measured in quantity terms or as a percentage of mean yield, have decreased. The null hypothesis that the absolute level of soybean yield losses due to drought has not changed cannot be rejected. But yield losses in percentage terms have decreased over time. Because drought is the primary cause of yield loss in the U.S. crop insurance program and because U.S. crop insurance rates assume that percentage of yield losses are constant over time, these results indicate that U.S. crop insurance rates in the Corn Belt are too high. |
| URI: | http://purl.umn.edu/54147 |
| Institution/Association: | Iowa State University>Center for Agricultural and Rural Development>CARD Working Paper Series |
| Total Pages: | 42 |
| Collections: | CARD Working Paper Series
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Files in This Item:
| File |
Description |
Size | Format |
|---|
| 09-WP_500.Yu-Babcock.pdf | | 156Kb | PDF | View/Open |
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