Question

Humus is important for plants growth as it is rich in nutrients and increase water holding capacity

Answer 1

Organic matter contributes to greater amounts of water retention following rains because it improves soil structure and thereby improves water-holding capacity. This results in betterplant growth and health and allows more movement of mobile nutrients(such as nitrates) to the root.

Answer 2

Explanation:

Humus is partially decomposed dark amorphous organic matter.

• Humus also helps in weathering of rocks, forms soil crumbs for increased aeration and hydration, has growth promoting minerals and releases nutrients slowly. It increases water holding capacity and adds partly degraded organic matter to soil.