Question

Why is organic matter (humus) an important part of soil?

• A. It helps to improve water infiltration
• B. It can break down organic pollutants
• C. It converts nitrogen in the air into nitrates used by plants
• D. It is rich in nutrients, which is important for fertility

Answer 1

The correct option is D It is rich in nutrients, which is important for fertility

Humus controls and regulates many soil functions, as well as plant growth. The better the humus count in the soil, the healthier and more productive soil will be. Regardless of the program one uses in farming operations, the higher the humus count, the better the crop is grown yield. Good humus count in the soil will hold soil moisture longer, thus less water is required for crop production. Also, good humus count reduces both water and wind erosion of soil.