61. The micronutrient needed in smallest amount
62. Which primary mineral having huge importance in terms of plant nutrition?
63. X-ray diffraction analysis follows which principle
64. The C : N ratio in humus is
65. Which part of cotton plant is used for tissue test
66. Which group of microorganisms have highest biomass in soil
67. In soil Taxonomy udolls is a suborder of
68. The least hygroscopic fertiliser is
69. Honey-comb structure is found in which group
70. Laterization is a process of accumulation in soil
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