Atlas of Soil Types, Soil Water, Soil Organic Matter and Other Hydrothermal and Gas Parameters of Black Soil

In terms of horizontal spatial distribution, the water-holding capacity is weaker in the southwestern part of the black soil region and stronger in the northeastern part; overall, the soil field capacity generally exhibits an increasing trend from south to north and from west to east.

For soil saturated hydraulic conductivity, the value is higher in the southwestern part of the black soil region and lower in the northeastern part in horizontal space, and it presents a decreasing trend from west to east and from south to north. In terms of horizontal spatial distribution of soil air conductivity, the value is higher in the southwestern part of the black soil region and lower in the northeastern part, and it shows an increasing trend from west to east and from south to north.