This presentation will help consultants, growers, and other practitioners in the Northeast USA region recommend or select seeding rates for soybean production. We will present studies (small plot and field-scale) that show optimum yields averaged about 200,000 seeds/acre for soybeans in rows of 7.5 inches (drilled), 15 and 30-inches (row crop planter) in the 1990s but now average about 170,000 seeds/acre for untreated and about 140,000 seeds/acre for treated (seed-applied insecticide/fungicide) seed. We did find subtle location by seed treatment by seeding rate interactions so we urge all farmers to conduct their own on-farm tests to fine-tune their seeding rates for each field on their farm.
