చరిత్రలో ఈ రోజు ఎఇఓ పరీక్ష

For AEO:

                        Soil Science

1. Soil pH is a measure of -->Soil acidity

2. Solonchack soil corresponds to -->Saline soil

3. Terai soils are deficient in -->Zinc

4. Crop most suitable for green manuring -->sunhemp

5. Best agricultural texture is found in -->Loamy soils

6. Father of soil testing -->M.L Troug

7. Element responsible for flocculation of soil -->Calcium

8. Clay particle size --><0.002mm

9. Kaolinite configuration is -->1:1type

10. Sesquioxides are oxides of -->Iron and aluminium

11. Natural soil aggregates are -->Peds

12. Particle size of 2mm to 7.5cm corresponds to -->Gravels

13. Purity of Gypsum -->Sulphur% Х 0.186

14. Cultivated soils have C:N ratio of -->10:1 to 12:1

15. Soil occurring highest in India -->alluvial soilsSEE MORE OF THIS HERE

16. Partially decomposed organic matter -->Peat

17. Highly decomposed organic matter -->Muck soil

18. Father of pedology -->V V Dokuchaiv

19. Most widely occurring clay mineral -->Kaolinite

20. Ballast elements are -->Aluminium and Silica

21. Exchange of gases in soil takes placedue to -->diffusion

22. Most dominant mineral on earths crust -->feldspars ( recent 2015 - Bridgmanite )

23. Zero tillage was first introduced by -->USA

24. The metamorphic rock Quartz is derived from -->Sand stone

25. O horizon is found only in -->Forestsoils

26. Zone of maximum leaching-->A horizon

27. Zone of maximum accumulation -->B horizon / illuvial horizon

28. Zone of least weathering and dessication -->C horizon

29. Most suitable soil for crop cultivation -->Crumby soil

30. Analysis of sand , silt and clay content is done by -->Hydrometric method

31. Instrument used to measure Density of soil -->Pycnometer

32. For soil to exhibit plasticity -->minimum clay content of 15 %

33. Purity of color is given by -->Chroma

34. Soil color is given by -->Munsell color chart

35. ICAR has classified Indian soils into-->8 groups

36. Black cotton soil or -->Regur

37. Limited expansion clay mineral -->vermiculate

38. Soil having no zonal differentiation-->Alluvial soil

39. Soil most suitable for plantation crops-->Laterite soils

40. Highest removal of soil particles take place by -->Sheet ersion

41. For Nitrogen a C:N ratio <20:1 -->Mineralization

42. Fertilizer having all three primary major nutrients -->Complete fertilizer

43. Conversion of soil nitrate into gaseous nitrogen -->Denitrification

44. Rhizosphere is found -->around the root zone

45. Red color of red soil -->ferric oxide46. A and B horizions together are known as-->Solum

47. Maximumdensity of water -->4 degree Celsius

48. In paddy fertilizer should be placed at -->reduced zone

49. Secondary nutrients are-->calcium, Magnesium and sulphur

50. Puddling in paddy is done to-->reduce percolation of water in soil

51. Avalability of phosphorus is highest at pH of-->6.5 – 7.5

52. Availability of Zn and fe is highest under pH--><5.5

53. Alkali soil reclamation is done by -->Using Pyrites

54. Simplest method of determination of soil moisture -->Gravimetric method

55. Bulk density of soils is highest in -->Sandy soil

56. Essentality of N was given by -->De Sassure

57. Most prevalent form of soil erosion -->Saltation

58. Largest soil order in India -->Inceptisols

59. Gilgai microreliefs are characteristics of -->Black soils

60. Problematic soils in india occur an area of about -->10mHa

61. Problem soils are highest in -->Uttar Pradesh

62. Which clay increase water retention in soil -->2:1 type clays

63. More organic matter content in soilsleads to -->Higher pore space and therebylower bulk density

64. Which condition is most suitable for soils -->Lower Bulk density

65. True density is also known as -->True density normal soils -->2.5gm/cm3

66. The equation S = f(Cl , O , R , P ,T) was given by -->Jenny which was a expandedequation of that given by Dokuchaeiv

67. Particles having size <0.001mm -->soil colloids ( colloidal property)

68. Free energy of water is expressed in terms of -->pF value

69. Soil saturated with water has a pF of -->0