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Question
Which of the following statements is correct?
A.

Ratio of quantity of water used beneficially to water delivered to field is called water storage efficiency.

B.

Ratio of quantity of water stored in root zone during irrigation to water needed in root zone before irrigation is called water conveyance efficiency.

C.

Ratio of quantity of water stored into the root zone of the crop to the quantity of water delivered to the field is called water application efficiency. 

D.

Ratio of quantity of water diverted from the reservoir to the water delivered to the field is called water use efficiency. 

Answer ( Option C)

Ratio of quantity of water stored into the root zone of the crop to the quantity of water delivered to the field is called water application efficiency. 

Solution

Water Conveyance Efficiency: It is defined as the ratio of quantity of water delivered to the field or the irrigated land to the quantity of water diverted into the canal system.

Water Application Efficiency: It is defined as the ratio of the quantity of water stored in the root zone of the plants to the quantity of water delivered to the field.

Water Use Efficiency: It is defined as the quantity of water used beneficially including the water required for leaching to the quantity of water delivered.

Water Storage Efficiency: It is defined as the ratio of the quantity of water stored in the root zone during irrigation to the quantity of water needed to bring the moisture content of the soil to the field capacity.

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