Fig. 2From: Leaf area index estimation model for UAV image hyperspectral data based on wavelength variable selection and machine learning methodsExperimental design. AK58, ZM27, XN509, and YM49-198 represent different winter wheat cultivars. AK58: Aikang 58; ZM27: Zhoumai 27; XN509: Xinong509; YM49-198: Yumai49-198. N0, N8, N15, and N22 represent nitrogen treatments of 0, 120, 225, and 330 kg hm−2, respectivelyBack to article page