5-Earth Science-Land-Soil-Layers
azonal soil profile
Soil can have no soil profile {azonal soil profile}.
intrazonal soil profile
Soil can have unstable but layered soil profile {intrazonal soil profile}.
zonal soil profile
Soil can have stable soil profile {zonal soil profile}.
pan layer
Hardened soil layers {pan layer} can be below topsoil.
topsoil
Soil surface layers {topsoil} can be porous and 0 to 24 inches thick.
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Date Modified: 2022.0225