Name two types of animal feed and write their functions.

Write the modes by which insects affect the crop yield.

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

What would happen if poultry birds are larger in size and have no summer adaptation capacity? In order to get small sized poultry birds, having summer adaptability, what method will be employed?

Suggest some preventive measures for the diseases of poultry birds.