Question
The ratio of volume of water that is stored in the root
zone of crops and ultimately consumed by transpiration or evaporation or both to the volume of water actually delivered at the field is defined as:Solution
Ea= ws/ wf x 100 where, Ea = water application efficiency, per cent Ws = irrigation water stored in the root zone of farm soil Wf = irrigation water delivered to the farm (at field supply channel)
One can distinguish a telescope from a microscope by observing –
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