kriging Agriculture 1 Biogeochemistry 1 Block approach 1 Block likelihood 1 China 1 Coal 1 Coal deposits 1 Coalfield 1 Coalfields 1 Composite likelihood 1 DBSCAN 1 Decision trees 1 Density-based spatial clustering of applications with noise 1 Interpolation 1 Land use 1 Land use type 1 Loess Plateau 1 Machine learning 1 Mining disturbances 1 Nitrogen 1 Organic compounds 1 Random forest 1 Random forests 1 Sampling points 1 Soil fertility 1 Soil fertility degradation 1 Soil organic matters 1 Soil surveys 1 Soils 1