Remotely sensing infrared canopy temperature is an efficient way to rapidly and non-destructively monitor the whole-plant response to water stress. It has often been used as a screening tool to select genotypes with drought and heat tolerance. It is reported that the drought-stressed plants show higher canopy temperature than the well-watered plants at both the vegetative- and anthesis growth stages. However, there is little information available about the effects of nutrient stress on the canopy temperatu...