Early season planting time (late April-early May): longer maturity group can improve yield; no benefit from increasing planting population; seed treatment-limited to stand improvement.
Mid season planting time (mid May-early June): limited impact from changing maturity groups; no benefit from increasing planting population (potential for reducing seeding rate); seed treatment-limited to stand improvement.
Late season planting time (mid June-late June): shorter maturity group can avoid poor seed quality; increasing planting population can improve yield; seed treatment-limited to stand improvement.