Which one is not a source of carbohydrate?

Why is excess use of fertilizers detrimental for the environment?

Why is organic matter important for crop production?

$(a)$ Mention the harmful effects of infectious diseases on the health of cattle.
$(b)$ How can these diseases be controlled?

$(i)$ Poultry is India's most efficient converter of low-fibre foodstuff into highly nutritious animal protein food. Justify the statement.
$(ii)$ What do we call the birds which are reared for eggs and those which are reared for meat?
$(iii)$ Name one indigenous and one exotic breed of poultry.

$(i)$ List three factors on which cultivation practices and crop yield depend.
$(ii)$ Name three stages involved in farming practices.