Tree-Structured Parzan Estimator-Machine Learning-Ordinary Kriging: An Integration Method for Soil Ammonia Spatial Prediction in the Typical Cropland of Chinese Yellow River Delta with Sentinel-2 Remote Sensing Image and Air Quality Data. - Yingqiang Song; Mingzhu Ye; Zhao Zheng; Dexi Zhan; Wenxu Duan; Miao Lu; Zhenqi Song; Dengkuo Sun; Kaizhong Yao; Ziqi Ding (Remote. Sens., 2023)