61. A branch of science that deals with the study of origin of the soil, its classification and description is known as
62. Nutrient index between 1.5 and 2.5 is categorized as
63. Which fertilizer/s is/are basic in nature?
64. Little leaf is caused due to deficiency of
65. A soil having pH 6.0 is called
66. Aluminium in octahedral sheet of clay mineral indicates
67. Iron is preferred by foliar spray because its soil application is
68. Alkali soil are reclaimed by the addition of
69. SOP is better than MOP when the crops are
70. Which one of the following is the correct quantity of zinc sulphate required to prepare 100 litres of 200 ppm solution for foliar spray? Quantity of zinc sulphate required (in grams)
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