A genetic "off switch" that shuts down the process in which legume plants convert atmospheric nitrogen into nutrients has been identified for the first time by a team of international scientists.

Sheep are especially good for weed control, as they graze close to the ground, and will readily eat thistles. In legume crops, sheep will graze out grassy weeds. Geese have been used in garden plots ...

Legumes improve nitrogen fixation and soil fertility after drought. Poor soil fertility reduces the growth of desired plants and gives weeds an opportunity to gain a foothold in pastures.

This is because the seedlings lack vigor and, therefore, do not compete against a companion crop, weeds or grasses as well as other forage legumes. However, good stands can be obtained by using all of ...