Michael Staton, Martin Chilvers and Chris Tiedje | Farmers Advance EAST LANSING, MI. — Soybean producers may be planting lower quality seed this spring due to last year’s challenging harvest conditions. Seed should be harvested as close to physiological maturity as possible. The frequent rains and poor drying conditions occurring last fall delayed harvest causing both fungal decay and physiological deterioration. Anthracnose and Phomopsis were first found on soybean plants last fall.