gleyed horizon

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Canadian system of soil classification — The Canadian system of soil classification is more closely related to the American system than any other. They differ in several ways. The Canadian system is designed to cover only Canadian soils. The Canadian system dispenses with a sub order… … Wikipedia
Podsolisation — is an extreme form of leaching which causes the eluviation of iron and aluminium sesquioxides.The process generally occurs in areas where precipitation is greater than evapotranspiration. The minerals are removed by a process known as… … Wikipedia
Solum — and soils are not synonymous. Some soils include layers that are not affected by soil formation. These layers are not part of the solum. The number of genetic horizons ranges from one to many. A surface layer that is 10 cm thick overlying bedrock … Wikipedia

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