Question

Why fertilizers and manure are added in the soil?

Answer 1

to make soil fertile to grow trees,crops....etc.

Answer 2

Explanation: Plants absorb nutrients from the soil. Therefore, the amount of nutrients present in the soil goes on decreasing. In a forest, these nutrients get naturally replenished by decaying of dead plants and animals. However, on a farm these nutrients have to be added to the soil in the form of manures and fertilizers. These manures and fertilizers contain plant nutrients such as nitrogen, potassium and phosphorus.

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