1. Father of Agricultural chemistry – J. V. Liebig
2. “Central soil salinity Research Institute” situated in – Karnal (Haryana)
3. Who is considered as father of soil testing – Troug
4. Law of restitution was proposed by – Liebig
5. Which horizon zone of Washing out – A (Eluvial)
6. Which horizon zone of Washing in – B (Illuvial)
7. Red soil mainly formed by which soil order – Alfisols Soils
8. Black soil mainly formed by which soil order – Vertisol soil
9. Largest Soil group is – Alluvial soil group (143 mha)
10. C:N ratio of micro organism – 4:1 to 9:1
11. Equivalent acidity of Anhydrous ammonia – 148meq/100gm
12. Equivalent acidity of Urea – 80-85
13. Equivalent acidity of DAP – 77
14. “International potash of Institute” situated in – Switzerland (1952)
15. Red colour of soil due to – Hematite
16. Red yellow color of soil is associated with – Ferric oxide
17. Which soil warmed up quickly – Sandy soil
18. The B horizon is generally absent in which soil ?????? – Black soil
19. Soil fertility and fertilizers was written by – Samuet L. Tisdale
20. Which micro-nutrient are non-metal element – Boron
21. Intracellular deposits of which element is known as plant opals ????? – Silicon
22. “Indian Society of soil science” (ISSS) established in which year – Dec. 1934 (Kolkata)
23. “International soil reference and information Center” situated in – Netherland (1966)
24. “International Union of soil science” founded in – 1924 (Australia)
25. For nitrification, the optimum pH is – 8.5
26. White alkali soils are – Saline soil
27. Humus fraction lightest in colour is – Fulvic acid
28. Pedoturbation is the process of – Mixing of the soil
29. In India, which soil order have negligible area ???? – Histosols
30. Particle density of clay soil is – 2.8
31. “Indian Institute of soil science” is situated in – Bhopal (MP)
32. “Indian Institute of soil and water conservation” is situated in – Dehradun
33. First production of fertilizer in India ????? – Single Super phosphate (1906)
34. Calcareous soil is formed in arid as well as – Humid region
35. Generally plant loses water through – Transpiration
36. Active soil forming factor are – Organism & climate
37. Which group of microorganism have add highest Biomass in soil – Fungi
38. Soil color determination by – Munsell’s chart
39. Cation exchange is an important component of – Soil fertility
40. Positive Bacteria color is – Red
41. “Sulfur Institute” situated in – Washington DC(1960)
42. First product of Urea if apply in soil – Ammonium carbonate
43. Which is best method for application Fe and Zn – Foliar application
44. Which is best suitable method for application Ca, B, S, and Mo – Soil application
45. Kandic and Arfullic origin found in which order – Alfisol
46. Surface color of Alkali soil is – Black
47. Lowest category of soil classification includes – Series
48. Sugarbeet is an indicator plant for – Sodium
49. Wheat is an indicator plant for – Copper
50. Chemical formula of siderite is – FeCO3
51. The pH of the soil solution determines – Active acidity
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