OBJECTIVE FORESTRY

Detailed explanation-1: -Soils develop because of the weathering of materials on Earth’s surface, including the mechanical breakup of rocks, and the chemical weathering of minerals. Soil development is facilitated by the downward percolation of water.

Detailed explanation-2: -The topsoil layer is the top surface of the soil where plants grow and animals live. It is a mixture of weathered rock fragments and humus. Underneath the topsoil is a layer called the subsoil. Subsoil is a layer of soil made up mostly of clay.

Detailed explanation-3: -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-4: -Rock fragments with weathering rinds normally are discrete clasts, ranging in size from pebbles to cobbles or boulders. They typically occur either lying on the surface of the ground or buried within sediments such as alluvium, colluvium, or glacial till.