The field application efficiency is the ratio of:
Choose the correct answer
Water delivered to field / water released at canal head
Water stored in root zone / water applied to the field
Water applied to field / water stored in reservoir
Water consumed by crop / rainfall
Correct Answer
B. Water stored in root zone / water applied to the field
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Field application efficiency (Ea) = water stored in root zone / water applied at field. Typically 60-80%. Overall project efficiency = Ea x Water conveyance efficiency x Water distribution efficiency. Low efficiency leads to waterlogging and wastage.
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