‘black soil type’ degraded grassland

’black soil beach’degraded meadow

’Black soil patch’ degraded meadow

’Black Soil Type’ degraded grasslands

“Black soil type” deteriorated grassland

“black soil type”deteriorated grassland

“Black soil”degraded grassland

“Black-soil” type degraded grassland

1∶50 000 soil database

10 layers soil model

1D exponential rough soil surface

2-d soil-cutting theory

2-layer soil

3D Pile-Group-Soil-Structure(PGSS) interaction

3-D settlement analysis of soil foundation

50000 soil database

a dry red soil

a finite soil layer

A layer of soil

a multi-layered soil