bedrock
clay
cross
development
diagram
dirt
earth
education
educational
environment
formation
geologic
geological
geology
grass
ground
horizon
illustration
landscape
layer
layers
material
mineral
nature
organic
profile
rock
sand
science
section
soil
stone
structure
subsoil
substratum
surface
texture
underground
定額
layers of the soil. A cross section of a soil, revealing horizons. Example of a soil profile: Organic, Surface, Subsoil, Substratum and Bedrock. Vector illustration.の素材 [FY310179429435]
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