Soybean Planting Date, 2007(2007) Soybean Planting Date, 2007. Iowa State University Extension. Full text available as:
AbstractThe planting date for soybeans should be based on seedbed conditions and calendar date rather than soil temperature. The optimum time to plant soybeans in Iowa is the last week of April for the southern two thirds of Iowa and the first week of May for the northern one third of Iowa.
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