41. Instrument used to evaluate soil crust strength is
42. Permafrost is a layer where soil temperature is always
43. It has been observed that soil pH increases in
44. Saline soils comes under which soil group as Zonality concept?
45. Aspergillus niger test is used for
46. SSP can have an edge and DAP in the soil is
47. Leaching requirement can be estimated by formula
48. In determination of moisture equivalent, centrifugal force used . . . . . . . . times of gravity.
49. A subsoil includes
50. Most suitable form of N for flooded rice soil is
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