OBJECTIVE FORESTRY

Detailed explanation-1: -Answer and Explanation: The second soil layer, or second horizon is called the A horizon. It is rich in minerals and often referred to as top soil. The organic matter gives this horizon its rich brown color. This is the type of soil farmers want to use to encourage ample plant growth.

Detailed explanation-2: -The main layers of the soil are topsoil, subsoil and the parent rock. Each layer has its own characteristics. These features of the layer of soil play a very important role in determining the use of the soil. Soil that has developed three layers, is mature soil.

Detailed explanation-3: -Soil is made up of distinct horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to underlying rocky layers ( subsoil, regolith and bedrock). The top, organic layer of soil, made up mostly of leaf litter and humus (decomposed organic matter).

Detailed explanation-4: -Topsoil-Topsoil is considered the “A” horizon. It is a fairly thin layer (5 to 10 inches thick) composed of organic matter and minerals. This layer is the primary layer where plants and organisms live. Subsoil-Subsoil is considered the “B” horizon.