Types of Soil

Soil

Types of Soil for Class 5 Science

We see different types of soils at different places. Soil colour also differ from place to place, for example red soil, black soil, etc. Soil types changes due to its composition which comprises sand, silt and clay. In this concept, the students will know how the mineral composition changes the soil types.
After reading the concept, students will be able to:

• Differentiate between sandy soil, laterite soil and mountain soil.
• Compare water-holding capacity of clayey soil and desert soil.
• Explain how the alluvial soil is good for plant roots.
• Discuss the soil distribution in India.
• Match the crops with the suitable types of soil.

Each concept is explained to class 5 students using descriptions, illustrations, and concept maps. After you go through a concept, assess your learning by solving the two printable worksheets given at the end of the page.

Download the worksheets and check your answers with the worksheet solutions for the concept Types of Soil provided in PDF format.

Types of Soil:

Depending on the composition and size of particles, the soil is classified into the following types:

1. Sandy Soil:

• Sandy soil mainly comprises sand.
• The amounts of silt and clay are comparatively low.
• The air space among the particles of sandy soil is more, making it porous.
• It has the lowest water-holding capacity.

2. Clayey Soil:

• 25% of clayey soil comprises clay particles.
• It has a high density and is compact due to the nature of clay particles.
• The clay particles closely stick together. Hence, this soil is less porous and filled with less air.
• The water-holding capacity of this soil is high.

3. Silt:

• Silt is smooth, porous and has good water-holding capacity because of the silt particles.
• This soil is generally found near the areas flooded by rivers.
• Silt is rich in nutrients required for crop production.

4. Loamy Soil:

• Loamy soil comprises sand, silt and a small amount of clay.
• The soil is porous and provides enough space to the plant roots for gaseous exchange.
• It has a considerable amount of organic matter humus, making it highly fertile and suitable for agriculture.

Apart from the classification based on the major constituents, soils can also be differentiated based on the mineral content and the topographic area they are found in.
Some of the examples of such soils are given below—

 

1. Red Soil:

• This soil is rich in iron oxide, giving it the characteristic red colour.
• It comprises a large amount of clay and hence, is less porous with a high water-holding capacity.
• Found in the states of Odisha, Andhra Pradesh, Jharkhand and Chattisgarh.

2. Laterite Soil:

• This soil is considered to be the end product of tropical weathering.
• It is generally formed by leaching and hence, is less fertile.
• Laterite soil contains less clay and more gravel and stone particles.
• This soil is generally found in areas with high temperatures and low rainfall.

 

3. Mountain Soil:

• This soil is found in the Himalayan regions and some parts of the Western and Eastern Ghats.
• This type of soil is rich in humus and is very fertile.

4. Desert Soil:

• This soil is found in desert areas.
• Very little humus content is found in desert/arid soil.
• It is highly porous, which implies low water-holding capacity.
• It is rich in salts like calcium carbonate.
• The soil can be used for agriculture if proper irrigation facilities are available as it would require frequent irrigation for crop yield.

5. Alluvial Soil:

• Alluvial soil gets deposited due to the flow of surface water.
• This type of soil is mainly found near river beds, flood plains and water streams.
• This soil is light and porous, allowing the plant roots to breathe properly.
• It is rich in humus and nutrients like potash and lime with a good water-holding capacity, making it perfect for the cultivation of crops.

6. Black Soil:

• It is also called regur.
• Black soil is rich in minerals like calcium, potassium and magnesium.
• This soil has a high water-holding capacity.
• This soil develops cracks like clayey soil when dry, which helps in the aeration of the soil.

Soil Distribution in India:

The map below shows the major type of soils and their distribution in our country.

Crops Growing in Different Types of Soil:

Depending on the nature and constituents of soils, different types of crops grow in different types of soils.

New Words:

Did You Know?

Earthworms are called ‘farmer’s friends’ because they increase the soil's air and water content, thereby increasing its fertility.The layers of soil make up a natural water filtration system. As the water seeps down the soil layers, the unwanted materials and chemicals get filtered and pure water accumulates in the water table below.Every year, World Soil Day is celebrated on 5th December.