Theory 67/Engineering & infrastructure/Irrigation efficiency
Efficiency Is Applied Against Used
The claim
Irrigation efficiency is set by the ratio of water applied to water transpired, so furrow and drip systems differ by the fraction lost to evaporation and deep percolation.
01Mechanism
Only transpired water contributes to yield; the rest is loss.
02Prediction
Efficiency should track the ratio.
03Refutation
Efficiency tracking application rate would remove the loss terms.