What is the purpose of growing a "green manure" crop?

The purpose of growing a "green manure" crop primarily centers around improving soil fertility through the incorporation of the crop into the soil. Green manure crops are typically legumes or other plants that are grown specifically to be tilled back into the soil, enriching it with organic matter and nutrients. This practice enhances soil structure, increases microbial activity, and boosts the availability of essential nutrients such as nitrogen, which is often fixed by legumes during their growth cycle.

Incorporating these crops not only enhances nutrient levels but also improves soil moisture retention and aeration, which are vital for the health of subsequent crops. The organic matter from green manure contributes to the development of soil aggregates, benefiting overall soil health and resilience. This strategic approach helps reduce the need for synthetic fertilizers and promotes sustainable agricultural practices, supporting both immediate crop needs and long-term soil health.