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Q: With respect to irrigation efficiencies, the ratio of the quantity of water stored into the root zones of crops to the quantity of water actually delivered into the field is called :
  • A. Water-conveyance efficiency
  • B. Water-application efficiency
  • C. Water-storage efficiency
  • D. Water-use efficiency
Correct Answer: Option B - • Efficiency of water application–It is the ratio of the quantity of water stored into the root zone of the crops to the quantity of water actually delivered into the field. It may also be called on farm efficiency, as it takes into consideration the water lost in the farm. • Efficiency of water use–It is the ratio of the water beneficially used, including leaching water, to the quantity of water delivered.
B. • Efficiency of water application–It is the ratio of the quantity of water stored into the root zone of the crops to the quantity of water actually delivered into the field. It may also be called on farm efficiency, as it takes into consideration the water lost in the farm. • Efficiency of water use–It is the ratio of the water beneficially used, including leaching water, to the quantity of water delivered.

Explanations:

• Efficiency of water application–It is the ratio of the quantity of water stored into the root zone of the crops to the quantity of water actually delivered into the field. It may also be called on farm efficiency, as it takes into consideration the water lost in the farm. • Efficiency of water use–It is the ratio of the water beneficially used, including leaching water, to the quantity of water delivered.