Question

4. Read the following statements with reference to the soil.
1.)Weathering is a very fast process of soil formation.
2.)Percolation of water is faster in sandy soils.
3.)Loamy soil contains only sand and clay.
4.) Topsoil contains the maximum amount of humus.

Choose the correct statements from the above.​

Answer 1

Answer:

1)Both the mechanical breakup of rocks and the chemical weathering of minerals contribute to soil formation. The downward percolation of water brings dissolved ions and also facilitates chemical reactions. Soil forms most readily under temperate to tropical conditions, and moderate precipitation. 2) Rainwater percolates through the soil and collects above the bedrock. This level of groundwater is called water table. Sandy soil is quite loose, so the percolation rate of water is highest in sandy soil but lowest in the clay soil because it is very compact.3) Loamy soil is a mixture of sand, silt and clay and also has humus in it. Question 5. Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.4) Soil is usually layered. 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.

Explanation:

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