SOIL, CLASS 7
SHARMA CLASSES BHARATPUR SOIL Soil is one of the most important natural resources. It is the uppermost layer of earth’s crust which is blackish-brown in colour. Major functions of the soil are: 1. It supports plant growth by holding the roots firmly and supplying water and nutrients to the plants. 2. It acts as a natural habitat for many organisms like an earthworm, fungi, bacteria, ants, etc. 3. It is also essential for agriculture which provides us with food, clothing and shelter for all. 4. It supplies water and nutrients to plants. Humus Humus is the organic component present in the soil formed by the decomposition of plant materials by microorganisms present in the soil. Humus is the rotting dead matter in the soil. Weathering Weathering is the breaking down or dissolving of rocks and minerals on Earths surface. Water, ice, acids, salt, plants, animals, and changes in temperature are all...