Question

If soil has all the nutrients, then why we need to replenish it?​

Answer 1

Answer:

It is necessary to replenish the nutrients into the soil because all the nutrients that soil has are used up by the plants during their growth so for the continuos supply of nutrients to the plants it is necessary to replenish the soil again and again.

Answer 2

We need to replenish soil because if a farmer continues to grow crops one after the other than the all nutrients available in the soil reduces and there is no available nutrients for the other plants of crops .

That's why the farmer used to replenish the soil even if the soil has nutrients .