INDIAN GEOGRAPHY

Detailed explanation-1: -The next horizon below the topsoil is horizon B i.e. subsoil. This layer is more dense and harder than the topmost The subsoil is usually paler in color than the topsoil. It has less humus in it. This layer is rich in minerals brought down from the topsoil.

Detailed explanation-2: -The uppermost layer is called topsoil and this layer contains humus, plant roots, and living creatures. The more humus found in topsoil, the more nutrient rich the topsoil and the better the conditions for growing plants. The middle layer is called subsoil.

Detailed explanation-3: -Topsoil. The layers of the soil are called horizons. The uppermost horizon is called the topsoil layer. The topsoil layer is a mixture of sand, silt, clay and broken down organic matter, called humus.

Detailed explanation-4: -The A-Horizon or Topsoil This layer is rich in organic material and is known as the humus layer. This layer consists of both organic matter and other decomposed materials.

Detailed explanation-5: -A-Horizon, the topmost layer of the soil profile is soft, porous, rich in humus and minerals. It is in this layer that most of the plants grow. Many living organisms like earthworms, rodents, etc live in this layer.