What is the correct representation for the calculation of NIR?

What is the correct representation for the calculation of NIR? Correct Answer CIR + leaching losses

Net irrigation requirement (NIR) can be defined as the amount of irrigation water required to be delivered at the field to meet the evapotranspiration and leaching losses. NIR = (Cu – Re) + amount of water required for leaching = CIR + leaching losses requirement.

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