OBJECTIVE FORESTRY

Detailed explanation-1: -The uppermost layer of the land forms a layer called soil. Soil is defined as a mixture of clay, or rocky particles and organic remains of plants and animals. It is responsible for forming the upper layer of surface of earth which means that it covers the land.

Detailed explanation-2: -The topmost layer of the soil is called topsoil. This layer is usually fairly loose, porous, dark and rich in humus. The humus is derived from decomposed and partly decomposed organic matters of plant and animal origin in the soil.

Detailed explanation-3: -It is formed by mineral particles, organic matter, water, air and living organisms. Soil is defined as the top layer of the earth’s crust.