The principal cereal crop of India is

The common biofertilisers used in organic farming are

Maximum milk yielding breed of buffalo is

Fill in the blanks by choosing correct option from the following

I. Puccinia causes ………. disease in wheat.

II. Blast is a …………. disease of paddy.

III. Chemical used to kill weeds are called ……… .

IV. Pesticides are ………… chemicals.

Choose the correct option.

Match the following columns and choose the correct option from the codes given below: