To solve the food problem of the country,which among the following is necessary?

Find out the correct sentence about manure:
$(i)$ Manure contains large quantities of organic matter and small quantities of nutrients.
$(ii)$ It increases the water holding capacity of sandy soil.
$(iii)$ It helps in draining out excess water from clayey soil.
$(iv)$ Its excessive use pollutes the environment because it is made of animal excretory waste.

Match the following Column $A$ and Column $B$:

Column $A$	Column $B$
$(a)$ Cattle used for tilling and carting	$(i)$ Milk producing female
$(b)$ Indian breed of chicken	$(ii)$ Broiler
$(c)$ Sahiwal,Red Sindhi	$(iii)$ Draught animals
$(d)$ Milch	$(iv)$ Local breed of cattle
$(e)$ Chicken better fed for obtaining meat	$(v)$ Aseel

To solve the food problem of the country,which among the following is necessary?

The major groups of activities for improving crop yields can be classified as:

Mention two factors which affect food grains during storage.