INDIAN GEOGRAPHY

Detailed explanation-1: -Humus is dark, organic material that forms in soil when plant and animal matter decays.

Detailed explanation-2: -The mixture of rock particles and humus is called the soil. Living organisms, such as bacteria, plant roots and earthworms are also important parts of any soil.

Detailed explanation-3: -Soil is a mixture of four materials: weathered rock particles, organic matter, water, and air. Weathered rock particles are the main ingredient of soil. Soils differ, depending on what types of rock the rock particles came from-for example, granite or limestone.

Detailed explanation-4: -Soil is the thin layer of material covering the earth’s surface and is formed from the weathering of rocks. It is made up mainly of mineral particles, organic materials, air, water and living organisms-all of which interact slowly yet constantly.

Detailed explanation-5: -Humus is the layer formed on soil due to the decomposition of dead plants and animals by microbes.