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Define B horizon: a subsurface soil layer that is immediately beneath the A horizon from which it obtains organic matter chiefly by illuviation and…


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Notes: B horizons: are commonly referred to as the subsoil. They are a zone of accumulation where rain water percolating through the soil has leached material from above and it has precipitated within the B horizons or the material may have weathered in place. Well drained soils typically have the brightest color ...


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Define B horizon. B horizon synonyms, B horizon pronunciation, B horizon translation, English dictionary definition of B horizon. n. In ABC soil, the second and middle zone, characterized by an accumulation of soluble or suspended organic material, clay, iron, or aluminum.


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B-horizon definition: the second soil zone, in which material leached from the overlying zone is concentratedsee ABC soil...


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In addition, it is defined as having a distinctly different structure or consistency than the horizon(s) above and the horizon(s) below. They may also have stronger colours (is higher chroma) than the A horizon. As with the A horizon, the B horizon may be divided into B1, B2, and B3 types under the ...


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A HORIZON- This is the layer that we call "topsoil" and it is located just below the O Horizon. This layer is made up of minerals and decomposed organic matter and it is also very dark in color. This is the layer that many plants roots grow in. B HORIZON- This is the layer that we call "subsoil" and it is located just below the A  ...


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Through the interactions of these four soil processes, the soil constituents are reorganized into visibly, chemically, and/or physically distinct layers, referred to as horizons. There are five soil horizons: O, A, E, B, and C. (R is used to denote bedrock.) There is no set order for these horizons within a soil. Some soil profiles have ...


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Bhf --- more than 5% organic C. No minimum thickness is specified for a BF or a Bhf horizon. Thin Bf and Bhf horizons do not qualify as podzolic B horizons as defined later in this chapter. Some Ah and Ap horizons contain sufficient pyrophosphate-extractable Al + Fe to satisfy this criterion of f but are designated Ah or Ap.