The decision on when to terminate cover crops may affect the overall yield of the upcoming cash crop. Research is showing that a later termination may result in a lower overall yield. However, that doesn’t mean early termination is right for your field.

Legumes still can provide valuable N to today’s cropping systems. Legumes also contribute a non-nitrogen rotation effect due to addition of soil organic matter and improvement in soil health. Corn grown following alfalfa stands that are 2+ years old (and contained at least 50% alfalfa) require no nitrogen fertilizer on many soils. Red clover N credits are less than for alfalfa.

Several months ago experts from Purdue University discussed the herbicide shortage for the 2022 growing season and outlined a couple of scenarios where growers can switch to alternative herbicides to accomplish the same weed control objectives. In this article, they discuss some options for fields that have a mixture of cover crop species growing in them and how to effectively terminate the cover crops before corn or soybean production.