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1. The crop most suitable for black soil is:

2. Alluvial soil is mainly deposited by:

3. Old alluvial soil is called:

4. New alluvial soil is known as:

5. Red soil gets its colour due to:

6. Laterite soil develops in which type of climate?

7. Which soil is rich in humus in forested areas but poor in semi-arid regions?

8. Arid soil is generally:

9. The Kankar layer in arid soils restricts:

10. Forest soils are generally:

11. The removal of soil cover by natural or human forces is called:

12. Gully erosion converts land into:

13. Soil erosion due to sheet-like flow of water is called:

14. Ploughing along the contour lines is called:

15. Cutting steps on slopes to restrict erosion is called:

16. Growing strips of grass between crops is known as:

17. Planting trees in lines to reduce wind erosion is called:

18. Which soil takes millions of years to form a few centimetres?

19. Which type of soil is ideal for cashew nut cultivation in Tamil Nadu and Kerala?

20. Which soil is sticky when wet and forms deep cracks in hot weather?