The ratio of quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as
- AWater conveyance efficiency
- BWater use efficiency
- CWater application efficiencyCorrect
- DNone of the above
Solution
Concept
Definition of water application efficiency
Formula
NONE
Step-by-step solution
1. Water application efficiency evaluates how effectively irrigation water delivered to the field is retained for crop use. 2. It is calculated as the ratio of the quantity of water stored in the root zone to the quantity of water actually delivered to the field. 3. Therefore, this ratio defines the water application efficiency. Answer: C
Explanation
Water application efficiency measures how effectively irrigation water applied to a field is stored within the root zone for plant consumption. It is calculated by dividing the volume of water stored in the crop root zone by the total volume of water delivered to the field.
Why the other options are wrong
A) Water conveyance efficiency measures the ratio of water delivered to the field relative to water diverted from the source. B) Water use efficiency is the ratio of water beneficially used to the water delivered. D) Option C is correct as water application efficiency specifically measures root zone storage relative to field delivery.
Shortcut
Application efficiency = Water stored in root zone / Water delivered to field.
Common mistake
Confusing water application efficiency with water conveyance or water use efficiency.
Correct answer: C) Water application efficiency