Which of the following statements regarding leaching is are correct 1 Leaching leads to washing away...........

Geography and Environment (PCS) World - Soil and Vegetation

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Which of the following statements regarding leaching is/are correct?

1. Leaching leads to washing away of lime and silica, leaving behind aluminium compounds.

2. Laterite soils are formed by leaching due to heavy tropical rains.

3. When manured and irrigated its suitable for growing tea.

Select the correct answer using the code given below:

1,2 and 3

1 and 2 only

1 only

2 and 3 only

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Explanation:

Statement 1 is correct as leaching involves desilication of soil. In this process, the lime and silica from soil percolates below leaving behind aluminium compounds at the top.As the process of leaching involves washing away of nutrients from top soil.The nutrients are percolated below the soil.

Statement 2 is correct as the laterite soils are formed in regions of heavy seasonal rainfall resulting into weathering of rocks followed by leaching.

Laterite soils lack fertility due to intensive leaching. When manured and irrigated, some laterites are suitable for growing plantation crops like tea, coffee, rubber, cinchona, coconut, arecanut, etc. In some areas, these soils support grazing grounds and scrub forests. Hence statement 3 is correct.