Question

Humus is important for plant growth because

• A. It is partially decomposed
• B. It is derived from leaves
• C. It is rich in nutrients and increases the water holding capacity of soil
• D. It is made up of dead organic matter

Answer 1

Answer: (C)

It is rich in nutrients and increases the water holding capacity of soil

Humus is partially decomposed dark amorphous organic matter. Humus is formed from detritus or litter i.e., animal refuse and plant debris. 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. Thus, increasing its productivity.