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Soybean Seed Yield Response to Planting Date and Seeding Rate in the Upper Midwest

Iowa State University, 2104 Agronomy Hall, Ames, IA 50011

View larger version (20K): [in this window] [in a new window]   Fig. 1. Seed yield response to changes in seeds m–2 and seed mass at Ames, Crawfordsville, De Witt, Nashua, Nevada, and Whiting, IA, from 2003 to 2006. Solid lines are reference lines for three seed masses (mg seed–1 x seeds m–2). The dashed line is the regression line for all data points.