Soil Test - 1

Explanation:

The different layers of soil are together called soil profile. The term soil profile represents the vertical section of earth crust, which is made up of a succession of horizontal layers, each of which varies in thickness, colour, texture, structure, consistency, porosity, acidity  and composition.

Explanation:

Laterite Soils  are found in areas of India with heavy rainfall, particularly near the coasts. It is an acidic soil and is rich in iron, which gives the soil a somewhat red appearance. It is used to grow more tropical crops such as cashew, rubber, coconut, tea and coffee.

Explanation:

New alluvium found on much of the Indo-Gangetic floodplain is called khadar and is extremely fertile and uniform in texture

Explanation:

The finest particles of the soil are called clay are smaller then 0.02 mm. A clay layer won’t let pass water. Pure clay particles are smooth and stick to your fingers.

Explanation:

Weathering of rock takes place by action of wind, water and Glacier. Earthquake is not a natural force to cause weathering.

Explanation:

The third layer is the C-horizon, which is made up of small lumps of rocks with cracks and crevices. Below this layer is the bedrock, which is hard and difficult to dig with a spade. water can be held in the tiny gaps. The weathering of soil takes place in C-horizon of soil profile.

Explanation:

Alluvial soil is found in the northern plains of India. Alluvial soil is rich in potash but poor in potassium and nitrogen. Nevertheless, it is a very fertile soil, which can support a wide variety of crops such as rice, wheat, cotton, jute and sugarcane.

Explanation:

Black soil is formed by the weathering of basaltic lava rocks. These are mostly found in volcanic regions.

Explanation:

The process of breaking down of rocks by the action of wind, water and climate is called as weathering. Soil is formed by weathering.

Explanation:

Volcanic soils are soils in which more than half of the parent mineral matter is volcanic ash ans appear very dark in colour. They are often very rich in nutrients and hold water well because of their volcanic ash content. These soils are called Andisols, and they are often very young, and acidic depending on which type of volcano they come from.