61. Glass electrode can be used for the estimation soil pH range of
62. Preparation of FYM by Trench Method is given by
63. Acid rocks have . . . . . . . . silica.
64. Which biological organism having highest influence on soil aggregate formation?
65. Which soil order have highest area in India
66. For vermiculite, isomorphous substitution mainly occur at
67. Which of the following is correct
68. A sandy soil needs frequent irrigation because of
69. Which one of the following will perform very poor as a source of N fertilizer under waterlogged rice field
70. Readily available water in constant matric suction is more in
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