Pioneer invests serious research dollars into identifying the appropriate seed drop for each hybrid in the Pioneer lineup. Customers need access to this information because not all hybrids are the same.
Pioneer sales reps and Pioneer customers have access to a plant population calculator at http://www.pioneer.com/home/site/us/agronomy/
It is a cool tool that allows you to select the hybrid, input the cash price of corn, the cost of seed and the yield level that is reasonable for your farm.
For today's purpose I have used $5.00 per bushel, the current board price for new crop corn at our local elevator, $2.50 per thousand seed cost and 180 bushel yield environment. A standard 5% stand loss is factored into the calculation. I have selected 3 popular Pioneer hybrids that have very different population response curves.
The chart below belongs to P0118HR. The red line indicates the highest return as measured by net income on the left vs seed drop on the bottom.
Maximum income per acre is achieved at 31,532 seed drop for P0118HR.
Maximum income per acre is achieved at 34,995 seed drop for 38M58.
Maximum income per acre is achieved at 42,000 ????? seed drop. 38N88 is a very unique hybrid that can handle ultra-high populations and continue to produce yield.
As we can see, not all hybrids are created equal when it comes to plant population. Check it out.