Planting depth affects corn emergence, growth and development, and yield

Current planting depth recommendations for corn (Zea mays L.) producers range from 38 to 51 mm in the midwestern United States. Characterization of emergence and soil conditions at a depths under later-planted scenarios is important as days adequate field work April have been reducing may affect dates. Field studies were conducted Ohio 2017 2019 determine effects type on emergence, growth, grain yield. The research was two types (Strawn–Crosby or Kokomo) using randomized complete block design with four replications targeting three (25, 51, 76 mm). Sensors installed seeding measure moisture temperature during period. Plants harvested assess growth V3 yield R6. Seeds targeted 25-mm resulted shortest time 10% emerged but had least uniform (longest 10–90% emerged) compared depths. Shallow also correlated fewer leaves per plant kernels produced plant. Emergence 7 d 86 accumulated growing degree units (sGDU) after across fields reduction 5% day 0.6% sGDU, respectively. In Strawn–Crosby field, plot yields did not differ between depths; Kokomo increased by 8 when mm, respectively, 25 mm. Planting adjustments can enhance crop performance, though responses type.