Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 7 May 2008
Published in Agron J 100:79-88 (2008)
DOI: 10.2134/agronj2006.0286c
© 2008 American Society of Agronomy
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Comparison of Corn and Soybean Yields in the United States: Historical Trends and Future Prospects

D. B. Egli*

Dep. of Plant and Soil Sciences, Univ. of Kentucky, 427 Plant Science Building, 1405 Veterans Dr., Lexington, KY 40546-0312. Published with the approval of the Kentucky Agric. Exp. Stn. as Paper 06-06-133


Figure 1
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Fig. 1. Average state corn and soybean yields from 1866 to 2005 for states with relatively high-yield potential.

 

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Fig. 2. Average state corn and soybean yields from 1866 to 2005 for states with relatively low-yield potential.

 

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Fig. 3. The ratio of corn and soybean yield for three states with high- (Indiana, Illinois, Iowa) and three with low- (Kentucky, Missouri, Tennessee) yield potential.

 





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