Soil Science Important MCQs For Success | Live Test To Practice


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1. Conversion of inorganic element into its organic form is termed as
2. The process whereby nitrate-N is reduced to nitrous oxide and elemental N is
3. Absorption of NH4+ by the root ________________________ the uptake of K+
4. The high analysis N fertilizer is
5. Elements which are essentially required for all plants are
6. It is also termed as “muriate of potash”
7. In acidic soils, P availability decreases due to adsorption and precipitation with
8. Sulfate of potash has K2O
9. Nutrients which are required by plants in larger amounts are termed as
10. Nutrient ions present in soil reach to the root surface by
11. Delayed crop maturity is usually caused by too much
12. To convert P to P2O5 multiply by
13. Phosphorus retention in soil is more if there is a dominance of
14. Which of the following is not an essential plant nutrient?
15. The uptake of NH4+ by the plant roots result in the release of
16. The loss of nitrogen as NH3 gas from soil surface is termed
17. The conversion of NH4+ into NO3 -is called
18. The conversion of organic form of an element into inorganic form is termed as
19. In the presence of chlorophyll, simple sugars are synthesized from
20. C:N ratio which results in net mineralization is
21. An essential plant nutrient is defined as:
22. About 80 % P is transported from soil to root surface through
23. Which three of the essential elements do plants get primarily from water and air?
24. Phosphorus fertility buildup factor values are usually low in
25. There will be more fixations of P in soils having larger amounts of
26. The primary source of soil P is
27. In flooded rice soils, best source of N is
28. The most commonly used salt for potassium determination in soil is
29. DAP is a fertilizer source for
30. It is the central atom in the chlorophyll molecule


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