Bottom soil horizon

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Contents - Previous - Next. Appendix 1: Soil horizon designations. The capital letters H. A, E, B.
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Soil horizons

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Soil horizon - Wikipedia

Soils develop into layers. These layers, called horizons, are usually seen along road cuts and other areas where a cross section of the soil is exposed. Most soil profiles have a surface layer of organic material and two or three layers of mineral materials. It consists of detritus, leaf litter and other organic material lying on the surface of the soil.
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What Are the Four Layers of Soil?

Three kinds of symbols are used in combination to designate horizons and layers. These are capital letters, lower case letters, and arabic numbers; capital letters are used to designate master horizons and layers; lower case letters are used as suffixes to indicate specific characteristics of the master horizon and layer; arabic numerals are used both as suffixes to indicate vertical subdivisions within a horizon or layer and as prefixes to indicate discontinuities Soil survey manual , Issued October Reference is also made to Keys to soil taxonomy , 6th ed.
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It is made up mainly of mineral particles, organic materials, air, water and living organisms—all of which interact slowly yet constantly. Most plants get their nutrients from the soil and they are the main source of food for humans, animals and birds. Therefore, most living things on land depend on soil for their existence.
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