For good production of poultry birds,what kind of management practices are important?

Arrange these statements in the correct sequence for the preparation of green manure.
$(a)$ Green plants are decomposed in the soil.
$(b)$ Green plants are cultivated for preparing manure or crop plant parts are used.
$(c)$ Plants are ploughed and mixed into the soil.
$(d)$ After decomposition,it becomes green manure.

How is a fumigant different from a pesticide? Name one natural substance which can be used in place of a fumigant.

Write four methods of weed control.

Name the two vitamins which are added in the poultry feed.

$(a)$ State three ways by which pests attack the plants.
$(b)$ Name the chemical used to control pests.
$(c)$ Explain why excessive use of such chemicals should be avoided.