Yield and quality should be top of mind when growing corn silage. Corn silage is typically at its maximum yield and quality potential just after 50% kernel milk, according to Joe Lauer, Ph.D., extension specialist in corn agronomy, University of Wisconsin.
“For every one-day relative maturity unit change, it means two bushels per acre,” Lauer explained.
For example, a 90-day hybrid versus a 100-day hybrid would yield 20 bushels more, simply based on maturity selection.
“The selection of the hybrid dictates the management style that a grower is going to be using out in the field,” Lauer said. “In today’s bioengineered era, it’s important to know what you can and can’t do just by the traits in the hybrid that you pick.”
Remember, a later planting date often calls for a shorter-season hybrid in order to time harvest before a killing frost. Additionally, early planting — May 1 versus June 1 — typically results in a 20% to 30% yield swing.
TIME FERTILIZER APPLICATION
When it comes to fertilization, the source of nutrient application is not as important as the timing, rate and placement of nutrients. The true source decision lies in whether the nitrogen is needed immediately or in a delayed fashion.
Nitrification inhibitors can slow the release of nitrogen to later in the growing season when the plant needs it. This process can also be accomplished by split applying fertilizer pre-plant and later, right before the canopy begins to grow.
Be sure to consider the availability of phosphorus, potassium and other nutrients as identified in the soil test, as some interactions can occur that influence uptake.
