Notes on green manuring.

Abstract

Green manuring means the digging into the soil of growing crops so that the roots, stems and leaves can rot in the soil and so improve it. Sometimes the whole crop may be dug into the soil, such as cowpea when it flowers, or a crop may be pruned and the prunings dug into the soil such as the prunings from Crotalaria or Tephrosia when used as a temporary shade.