The preventive and control measures which are used before grains are stored for future use include:

Weeds affect the crop plants by:

Among the given options,which one is not correct for the use of large amount of fertilisers and pesticides?

Write four methods of weed control.

Sid went to market to buy foodgrains for his home and on returning when his mother found the grains discoloured and of low and poor quality,she returned them back to the vendor. The vendor told Sid's mother that it was due to the storage loss of the grains that resulted in their poor quality and gave her the good quality grains.
$(a)$ What kind of qualities are shown by Sid's mother?
$(b)$ What could be the control measures to prevent this storage loss?

Discuss why pesticides are used in very accurate concentration and in a very appropriate manner.