Regional analysis of planting date and cultivar maturity recommendations that improve soybean oil yield and meal protein concentration.

Planting date and cultivar maturity group (MG) are major management factors affecting soybean [ (L.) Merr.] yield, but their effect on seed oil and protein concentration, and in particular meal protein concentration, is less understood.

Runoff losses of sediment and phosphorus from no-till and cultivated soils receiving dairy manure.

Managing manure in no-till systems is a water quality concern because surface application of manure can enrich runoff with dissolved phosphorus (P), and incorporation by tillage increases particulate P loss. This study compared runoff from well-drained and somewhat poorly drained soils under corn (Zea mays, L.) production that had been in no-till for more than 10 yr.