Phenology-Adaptive Prediction of Walnut Leaf Area Index from UAV Multispectral Data via Hybrid Feature Selection and SHAP-Enhanced Machine Learning. - Xia, Qiuhao; Yerzati, Yerhazi; Li, Zihao; Qi, Jiahui; Chen, Jiaxing; Sen, Yu; Zhang, Rui; Zhang, Yunqi; Wang, Hongxia; Guo, Zhongzhong (Remote Sensing, 2026)