The chemical substances which destroy the weeds but do not harm the crop are called

Chain pump system is a _____ system of irrigation.

Beating the cut stalks against machine called _____

Excess use of ______ cause water and land pollution.

Through ______ plants get water for germination.

______ is the best method to save water.

________ensures uniform irrigation.

Choose the fermented food

Grains are separated from the stallks by the process of

There are _______ different techniques that are used in plant improvement.