Synthetic fertilizers should be

Farm yard manure is a good

What is done to remove the paddy grains from the plant after harvesting?

Rabi crops are grown in

A scarecrow is used to drive away

Urea is a

At home, using kitchen waste we can make

Which of the following helps to maintain the fertility of soil?

Irrigation is concerned with

Crop rotation using peas as one of the crop helps to fix _______ in the soil.