71. Which physical parameter is an index of degree of compaction or looseness of soil?
72. In a dried plant, an essential element that constitutes the bulk of its weight is
73. Which chemical is used to differentiate between Light & Heavy minerals?
74. In GPS, at least how many satellites are required to locate a point?
75. Nitrogen fertilisation is applied for growth, but its excess
76. Intrazonal soils are mainly under influence of
77. The maximum fixation of K occurs
78. With addition of electrolytes in a soil-colloidal system, thickness of Double Diffuse Layer will
79. Rocks formed by solidification of molten magma at the surface of the earth are called
80. Biosuper is a fertilizer containing
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