81. Which of the following device is used to determine soil strength?
82. One unit of electricity is in fact equal to
83. Lesser is the number of the teeth on sprocket, the variation in the speed of chain drive is
84. Primary tillage operation aim to
85. The pH of the milk is between
86. Basic requirement of no (zero) tillage is
87. Clutch in the tractors is designed on the basis of
88. Average food grain loss per year in India is estimated to be . . . . . . . . %.
89. Ploughing is done to
90. Which soil moisture is useful for the growth of the plants?
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