Iowa’s soybean and corn cropping systems are among the most productive in the world yet, producing consistently high yields remains uncertain. This publication discusses possible solutions to problems that limit soybean yield in Iowa.
Iowa State University Extension and Outreach
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David Wright and Andrew W. Lenssen. "Recognizing Challenges to Iowa’s Annual Cropping Systems" Ames, IA(2013)
Available at: http://works.bepress.com/andrew_lenssen/43/