51. Which one of the following minerals is the main source of boron in soils?
52. Example of Gum Producing Bacteria is
53. Bone meal contains . . . . . . . . % of P2O5.
54. Equivalent acidity of anhydrous ammonia is
55. Chernozem soils are found in
56. Chemical formula of pyrite reclaiment is
57. Under low N supply, tillering in plants
58. Law of limiting factor is given by
59. Specific Surface of a spherical soil particle having 1.5 mm diameter is
60. Cat Clay or Acid Sulphate soils found in Kerala is known as
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