Irrigation Engineering
For a standing crop, the consumptive use of water is equal to the depth of water

Transpired by the crop
Evaporated by the crop
Used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil
Transpired and evaporated by the crop

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Irrigation Engineering
As per Lacey’s theory, the silt factor is

inversely proportional to average par¬ticle size
directly proportional to average par¬ticle size
not related to average particle size
directly proportional to square root of average particle size

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