Soil Science Important MCQs For Success | Live Test To Practice


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1. In the presence of chlorophyll, simple sugars are synthesized from
2. In flooded rice soils, best source of N is
3. The primary source of soil P is
4. The high analysis N fertilizer is
5. To convert P to P2O5 multiply by
6. Phosphorus retention in soil is more if there is a dominance of
7. The conversion of organic form of an element into inorganic form is termed as
8. The conversion of amino acids into ammonium is called
9. It is also termed as “muriate of potash”
10. Elements which are essentially required for all plants are
11. There will be more fixations of P in soils having larger amounts of
12. An essential plant nutrient is defined as:
13. A straight fertilizer is one having
14. Advantages of synthetic fertilizers include
15. Which three of the essential elements do plants get primarily from water and air?
16. The most commonly used salt for potassium determination in soil is
17. Which of the following is not an essential plant nutrient?
18. In acidic soils, P availability decreases due to adsorption and precipitation with
19. Absorption of NH4+ by the root ________________________ the uptake of K+
20. The conversion of NH4+ into NO3 -is called
21. C:N ratio which results in net mineralization is
22. It is not part of any structural organic compound within plant body
23. The loss of nitrogen as NH3 gas from soil surface is termed
24. Phosphorus availability in most of the soils is in the pH range
25. Pakistani soils have average o.m content
26. Nutrient ions present in soil reach to the root surface by
27. It is the central atom in the chlorophyll molecule
28. Sulfate of potash has K2O
29. Nutrients which are required by plants in larger amounts are termed as
30. Delayed crop maturity is usually caused by too much


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