Optimum Corn Population
Corn population should be between 29,000 and 31,000 plants per acre at harvest to produce the maximum grain yield. Grain yield is lower for populations below this. Table 1 gives the relationship between yield and harvest plant population. To achieve this harvest population, I suggest increasing the seeding rate by 15% when corn is planted prior to May 1 and 10% when corn is planted after May 1. Soil temperatures are lower in late April and there is a greater risk that some kernels nay not successfully germinate and emerge so one should increase the seeding rate to obtain the desired final stand to produce the maximum grain yield.