Write two examples each of the fishes that are:
$(i)$ Top dwellers
$(ii)$ Middle dwellers
$(iii)$ Bottom dwellers,in composite fish culture.

Differentiate between mixed cropping,intercropping,and crop rotation.

What are Rabi and Kharif crops? Give two examples each.

$A$ little baby was playing in a park with his maid. Suddenly,he fell down and got a minor injury. The maid applied tincture of iodine on the wound.
$(a)$ Why did she apply tincture of iodine on the wound?
$(b)$ Name the solute and solvent present in tincture of iodine.
$(c)$ Enlist the values shown by the maid.

$A$ farmer wanted to invest some money in fish farming. But he did not get right guidance.
$(a)$ How can you guide him for a profitable business in spite of limitations of fish farming?
$(b)$ What is the limitation of fish farming?

Define $(i)$ Vermicompost,$(ii)$ Green manure,and $(iii)$ Biofertilizer.