61. Graded terraces are adapted in areas where rainfall exceeds . . . . . . . . cm.
62. Heat value of biogas is about . . . . . . . . Kcal/kg.
63. Extraction of a soluble constituent from a solid by means of solvent is known as
64. The power availability on the Indian farm is approximately
65. Good structure for crop production is
66. In a heat transfer problem involving buoyancy effects, the relevant dimensionless number is
67. Which of the following quantity is not a scalar?
68. The lateral stability of a four wheel tractor in a turning situation can be increased by:
69. Which of the following tractor has the air cooled engine?
70. Increased CO2 concentration due to pool soil aeration will cause
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