Planting 225,000 seeds per acre is not cost effective.
In extension studies, seeding rates used are typically between 75,000 and 225,000 seeds per acre. Since 2003, Iowa State University Extension researchers have conducted more than two dozen experiments with the checkoff and the Iowa Soybean Association at multiple locations across Iowa.
An important question that is often asked is, "how many seeds need to be planted to attain this final stand at harvest?" In a perfect world, the relationship would be 1:1, indicating that every seed planted would correspond to a plant at harvest. In last week's article, Soybean seeding rates: The balance between cost and yield, the case was made that 100,000 plants per acre at harvest was sufficient to reach both full yield potential and economic return.
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