Question

how are the soil nutrients replenished ?​

Answer 1

Answer:

When the plants are grown, they absorb the nutrients from the soil due to which the amount of plant nutrients in the soil goes on decreasing. This reduces soil fertility. And when the crop plants are grown in the same fields again and again, then the soil becomes deficient in the plant nutrients like nitrogen, phosphorus, and potassium.

Due to this, the plant nutrients need to be added from time to time to enrich the soil and restore soil fertility. The plant nutrients are replenished in the soil in the following two ways:

1] Adding Fertilisers and Manures

2] Growing Leguminous Crops

Answer 2

When fertilisers and manures are added to the soil in the fields, then the soil gets enriched with nutrients like nitrogen, phosphorus and potassium, etc. The crop plants can then grow well in this soil.