Question

why pea plant replenishes the soil

Answer 1

Answer:

In addition to storing nitrogen, the roots of pea plants help loosen the soil as they reach out for moisture. Once the plants die, merely turn them back into the soil to replenish organic matter.

Answer 2

Answer:

Roots of pea plant contains rhizobium, which is a nitrogen fixing bacteria. Rhizobium converts atmospheric nitrogen into nitrates and nitrites, and discharges it into the soil. Hence, pea plant replenishes the soil with important nutrients.