Why is it necessary to add manure or fertiliser to the field to get a good crop?

Q. What will happen if we keep on growing crop after crop without using manure or fertilisers?

Q. Select the correct ption after reading the statements.
1. Green manure includes rotten plant and animal waste.
2. Compost manure includes uprooted or sown crop parts left to be withered on a field, such that they act as fertilisers for the soil.

Q. Choose the correct statement.
Statement 1: Fertilisers add humus to the soil.
Statement 2: Manure does not cause water pollution.

Q. Why is it necessary to have good communication skills?