Cover crop
Crimson clover is a valuable cover crop. When sown during summer, its vigorous growth during the subsequent autumn provides good cover before winter and prevents soil erosion. It has a suppressive effect on weeds. Crimson clover is an N scavenger during growth, resulting in lower N losses from the soil during winter. As an N-fixing legume, crimson clover has a positive effect on the soil N status that benefits the following crop. With its dense root system, the cover crop improves soil structure and returns a good amount of organic matter.
In the USA, crimson clover blooms were found to contain minute pirate bugs (Anthocoridae), a beneficial insect that preys on pests, especially thrips. In Georgia, the use of crimson clover reduced insecticide use by 30 per cent in cotton crop (SARE, 2008).