IFPRI Paper on Contribution of Bt Cotton to Long-Term Average Cotton Yields in India
May 4, 2012| |
A discussion paper released by the International Food Policy Research Institute (IFPRI) examined the contribution of Bt cotton adoption to long- term average cotton yields in India using a panel data analysis of production variables in nine Indian cotton-producing states from 1975 to 2009.
The results show that Bt cotton contributed 19 percent of total yield growth over time, or between 0.3 percent and 0.4 percent per percentage adoption every year since its introduction. Besides Bt cotton, the use of fertilizer and the increased adoption of hybrid seeds appear to have contributed to the yield increase over time. However, if official Bt cotton adoption contributed to increased yield after 2005, unofficial Bt cotton might also have been part of the observed increase of yields starting in 2002, the year of its official introduction in India.
Check out the publication at http://www.ifpri.org/sites/default/files/publications/ifpridp01170.pdf.
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