Fig. 5From: Improving the prediction performance of leaf water content by coupling multi-source data with machine learning in rice (Oryza sativa L.)Model construction (a) and validation (b) of normalized difference index (ND) for monitoring LWC at different growth stages of rice plants. Each symbol is the average value from 5 (a) and 4 (b) repeated measurements. Dashed lines represent 1:1 lines; * and ** indicate significant correlation at 5% and 1% probability level, respectivelyBack to article page