What is the Water Use Efficiency (WUE) of rice if the grain yield is 6000 kg/hectare with evapotranspiration of 950 mm?

Correct option is D

✅ (d) 6.31 ha.mm
· WUE = Grain yield (kg/ha) ÷ Evapotranspiration (mm) ⇒ WUE = 6000 ÷ 950 = 6.31 kg/ha.mm
· This value indicates the efficiency of water utilization for grain production in rice.
· WUE is crucial for irrigation scheduling and water resource management.
❌ (a) 63:1 ha.mm
· A miscalculated value, 10 times the actual figure. Incorrect computation.
❌ (b) 0.631 ha.mm
· Incorrect decimal placement, underestimating WUE by a factor of 10.
❌ (c) 631 ha.mm
· Overestimated value, 100 times the correct WUE. Computational error.