What are different types of soil according to their texture ?
Answers
(USDA classification)Diameter limits (mm)
(WRB classification)Clayless than 0.002less than 0.002Silt0.002 - 0.050.002 - 0.063Very fine sand0.05 - 0.100.063 - 0.125Fine sand0.10 - 0.250.125 - 0.20Medium sand0.25 - 0.500.20 - 0.63Coarse sand0.50 - 1.000.63 - 1.25Very coarse sand1.00 - 2.001.25 - 2.00
Answer:
The different types of soil particles based on textures are as follows:
a) Clay – This soil is made up of the smallest size of soil particles and is lesser than 0.002 mm in diameter. Clay is smooth in texture.
b) Silt – This type of soil has particles that are bigger than clay particles and range from 0.002 mm to 0.2 mm in size. Silt is comparatively less smooth than clay and found on the river beds.
c) Sand – These are the largest soil particles with a diameter larger than 0.2 mm. They are coarse in texture and can be seen as a single particle with the naked eye.
d) Gravel – These are small stones present in the top layer of the soil.
Based on these types of particles, there are three basic types of soil.
a) Sandy soil – It has more sand in it and a very small amount of silt and clay. It is found in deserts and can hold air. However, such soil cannot hold much water as there are large spaces between the sand particles through which the water percolates easily.
b) Clayey soil – It has more clay in it and a small amount of silt and sand. This type of soil can hold water. As there are little spaces between the clay particles, the water percolates very slowly. However, this type of soil is not able to hold air.
c) Loamy soil – This type of soil has a mixture of silt, clay and sand along with humus. It is the best type of soil for growing plants and has the capacity to hold water as well as air.
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