Which of the following are exotic breeds of cattle?

The milkman in our society started carrying a lactometer. His move was well appreciated by the society members.
$(a)$ What is the use of a lactometer? On what principle does it work?
$(b)$ What values of the milkman are shown by this move?

On what factors do the growth of plants and flowering depend?

$(a)$ $A$ farmer wants to harvest more than two varieties at a time from his crop field. He has no idea about the cropping patterns. Suggest one method to get the desired result. Also,state three advantages of this cropping pattern.
$(b)$ Name any two fodder crops.

List out some useful traits in improved crops.

Bakut has a poultry farm. He feeds his birds with a protein and fat-rich diet in large amounts. The birds are in good health,but their egg quality is not good.
$(a)$ What should he do to get good production of eggs?
$(b)$ What should he add in the feed to make the shells of the eggs strong?