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  1. www.exploreiowageology.org › assets › textMaster horizon nomenclature

    May also be an eluvial horizon with respect to clay, iron, and aluminum. E – Mineral horizon formed by the eluviation of clay, iron, and/or aluminum. Typically, grey to white in color. Major difference from A is lack of organic matter accumulation. B – Mineral horizon that has lost all or most geologic structure and contains evidence for one or

  2. www.soils.org › soils-glossary › appendix-2APPENDIX II DESIGNATIONS FOR SOIL HORIZONS AND LAYERS

    AC – A horizon with characteristics of both an overlying A horizon and an underlying C hori-zon, but which is more like the A than the C. EA – A horizon with characteristics of both an overlying A horizon and an underlying E hori-zon, but which is more like the E than the A. EB – A horizon with characteristics of both an over-

  3. umn-soil-2125.github.io › lecture-summariesLecture 3-4: Soil Horizon Nomenclature and Profile Descriptions

    Understanding soil morphology and horizon nomenclature is essential for effectively describing, classifying, and communicating information about soils. By following the steps outlined in this lecture and applying the master horizon and suffix designations, soil scientists and other professionals can create standardized, informative soil profile descriptions.

  4. soils.uga.edu › Horizon-designation-examplesExample 1 - University of Georgia

    Explanation of horizon nomenclature 0-25 cm horizon is at the surface and has a dark color (low value). The soil is in improved pasture, has been plowed, and should have a ―p‖ designation. The 25 to 68 cm horizon has the same color, same texture, and granular structure and should also be an A horizon. The nomenclature is just ―A‖.

  5. soils.uga.edu › files › 2016A Key to Common Diagnostic Horizons in Soil Taxonomy

    (Bk) or fragipan (Bx) horizon, OR 1/3 of the thickness between the surface and the lower boundary of the deepest of an argillic, cambic, natric, oxic, or spodic horizon; c. ≥25 cm in all other cases. 3. An “A” horizon is umbric if it meets all the criteria of a mollic epipedon in 2. above, except it has a % base saturation of < 50%. 4.

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  6. www.nrcs.usda.gov › sites › defaultA Glossary of Terms Used in Soil Survey and Soil Classification

    Accumulation.—A term used in Soil Taxonomy and in the definitions of horizon suffix symbols to indicate that a specific material is present in a higher concentration than assumed for the original parent material. For example, a calcic horizon (Bk) has more calcium carbonate than is presumed to have been present in the parent material.

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  8. pdf.usaid.gov › pdf_docs › PNAAZ043Designations Master Horizons and Layers in Soils

    horizon formed by illuviation of organic material into a mineral subsoil is not an 0 horizon, though some horizons formed in this manner contain much organic . matter. A limnic layer that is organic is designated a C layer. .A horizons: Aincral horizons that formed at . the surface or