Fig. 1From: Comparison of new hyperspectral index and machine learning models for prediction of winter wheat leaf water contentLayout of the experimental design in 2018–2019 and 2019–2020. P1, P2, P3, P4, P5, P6 and P7 represented wheat cultivars, P1: Luomai 27, P2: Zhengmai 136, P3: Zhengmai 22, P4: Zhengmai 16, P5: Zhongyu 1211, P6: Luomai 34, P7: Zhoumai 18. w0, w1, and w2 represent different irrigation treatments: w0 is the irrigation during the bottom stage, w1 is the irrigation during the bottom and jointing stages, and w2 is the irrigation during the bottom, jointing, and grain-filling stagesBack to article page