Research results from five stations in Iowa show that producers must plant soybeans by mid-May to achieve maximum yields. Soil conditions must be ready for planting or compaction will affect plant growth throughout the season. Delayed planting may result in additional penalties due to weather interference and serious yield potential may be lost.
Iowa State University
Whigham, Keith, "Plant soybeans before mid-May" (1998). Integrated Crop Management News. 2293.
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