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Soil Science Ch3

QuestionAnswer
pedon smallest, sampling unit that displays the full range of properties characteristic of a particular soil, smallest volume that can be considered a "soil individual"
polypedon two or more continuous pedons
soil series most detailed taxonomic unit used for soil surveys
mollic epipedon(A) mineral surface horizon noted for its DARK COLOR, THICKNESS, SOFTNESS. high base saturation. high pH
percentage base saturation percentage of the soils negatively charged sites (cation exchange capacity) that are satisfied by attracting nonacid (base) cations
ochric epipedon (A) young A horizon, low in organic matter, THIN, LIGHT COLOR, not as deep as mollic or umbric
Umbric epipedon (A) same as mollic except low base saturation. higher rainfall and less Ca/Mg content in parent material.
Albic horizon light colored, eluvial, Fe/Al oxides and clay mostly removed
Argillic horizon silicate clay accumulation
Calcic horizon accumulation of CaCO3, MgCO3
Cambic horizon changed or altered by physical movement or chemical reactions
oxic horizon highly weathered, mixture of Fe/Al oxides and silicate clays
salic horizon accumulation of salts
spodic organic matter, Fe/Al oxide accumulation, illuvial, highly leached forest soils of cool humid climates (reddish brown/black)
Soil Classification Groups Order, Suborder, Great Group, Subgroup, Family, Series, Phase(not technically there)
Greenwhich series located in DE, ochric epipedon over Bt horizon. coarse, loamy, mixed, etc.
Soil Series name of location where soil was first described, means little to those unfamiliar with series present in an area
Phases (managment sub-series designations) texture, slope, stoniness, etc.
Created by: mlux
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