China 3 Soils 3 Biogeochemistry 2 Decision trees 2 Interpolation 2 Machine learning 2 Organic compounds 2 Random forest 2 Random forests 2 Soil organic matters 2 Soil surveys 2 accuracy assessment 2 machine learning 2 soil organic matter 2 Acidobacteria 1 Agriculture 1 Bacteria 1 Bacteria (microorganisms) 1 Bacterial community composition 1 Bacterial diversity 1 Bacterial function prediction 1 Coal 1 Coal deposits 1 Coalfield 1 Coalfields 1 DBSCAN 1 Deltaproteobacteria 1 Density-based spatial clustering of applications with noise 1 Digital soil mappings 1 Dongzhi Loess Tableland 1