Mention two factors which affect food grains during storage.

$(a)$ What do the terms 'macronutrients' and 'micronutrients' signify?
$(b)$ Briefly describe the formation of vermicompost and green manure.

While selecting a breed of crop,which characteristics of the crop are to be taken into account by the farmers?

An Italian bee variety $A. mellifera$ has been introduced in India for honey production. Write about its merits over other varieties.

Mention two advantages of animal husbandry.

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?