An agricultural land of 437 ha is to be irrigated for a

An agricultural land of 437 ha is to be irrigated for a particular crop. The base period of the crop is 90 days and the total depth of water required by the crop is 105 cm. If a rainfall of 15 cm occurs during the base period, the duty of irrigation water is

Net water required = 105 – 15 = 90 cm
D × Delta = Duty × Base period

D =	1 × (90 × 24 × 60 × 60)	× 10⁴ (m² to hectare) = 864 hectares/curve
	0.9

Duty =	864 × B	=	864 × 90	= 864 ha/cumec
	Δ		90