The bacteria in leguminous plants fix _____ .

Grains are separated from the stallks by the process of

Through ______ plants get water for germination.

In _______ method different crops are grown alternately.

Before ______ the land must be watered.

One of the biggest canal project in India is

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

The available land for ______ has been decreasing.

_______ check the quality and standard for agricultural products.

______ irrigation is used where the soil cannot retain water for a long time.