Soil Science MT - 2
1.…………….is a very common iron oxide (Fe3O4) mineral that is found in igneous, metamorphic, and sedimentary rocks.
2. Calcite is the principal constituent of ...........
3. Which one of the following minerals is a source of P in the soils?
4. The mineral with the highest iron content (72.4%).
5. Gypsum is high in……
6. Contour bund is followed in which type of soil?
7. In waterlogged soil the concentration of which of the following is high
8. Drip irrigation is more suitable for
9. Which clay mineral is responsible for cracking in black soil?
10. pH meter measures...........
11. Which instrument is used for the estimation of potash (K) ?
12. EC (Electrical Conductivity) meter measures
13. Olsen method is used for phosphorus estimation in
14. Spectrophotometer is used for determination of ………….
15. If the soil textural class has clay content more than 45 %, then it is called?
16. The process of soil formation is known as:
17. Which of the following is a primary mineral?
18. The soil horizon characterized by the accumulation of organic matter is:
19. The permanent wilting point is reached when the soil water potential is approximately:
20. Cation exchange capacity (CEC) is highest in:
21. The main factor influencing soil color is:
22. Which of the following is a secondary mineral?
23. The process of converting ammonium to nitrate is called:
24. The soil texture with the highest water holding capacity is:
25. The soil pH range considered neutral is:
26. Which of the following is a macronutrient essential for plant growth?
27. The process of soil particles aggregating into clumps is called:
28. The instrument used to measure soil bulk density is:
29. The soil order characterized by permafrost is:
30. The process of removing excess salts from saline soils is called:
