Corn profitability: A function of planting rate and depth
Thomison says the planting rate should be adjusted to reflect the potential soil productivity.
- Higher seeding rates should be reserved for soils with higher fertility and water holding capacity.
- A final stand of 33,000 may be required to maximize yields.
- Lower seeding rates are recommended for droughty soils or late planting, which are planted after June 1
- Seeding rates can also be reduced to lower production expense, but that alternative usually costs more than it benefits.
- Adjust the seeding rate 10% to 15% higher if emergence problems are anticipated due to an early planting date.
Yield potential is increased if emergence is uniform and a good seedbed can be created with reduced tillage. Planting depth should be determined by temperature and moisture friendliness to the seedling. Planting rate should be determined by the soil fertility and water holding capacity.
Source: FarmGate blog