College of Resources and Environment;
Shandong Agricultural University;
Tai’an;
China;
Key Laboratory of Agricultural Ecology and Environment;
Shandong Agricultural University;
Tai’an;
China;
Bureau of Fruit Industry Development of Qixia County;
Qixia;
China;
Hyperspectral; Inversion; Vegetation; Index; Apple; Tree; Leaf; Potassium; Content; Random; Forest; Regression; Model;