WRB Flashcards
higher clay contents in subsoil, 5
luvisols, alisols, lixisols, acrisols, albeluvisols
limited soil formation, 4
fluvisols, leptosols, regosols, cambisols
oxygen deficiency, 3
gleysols, stagnosols, planosols
concentrated in Tropics with year round rain, 2
ferralsols, plinthosols
Thick dark Ah horizons, 4
Kastanozems,Chernozems, Phaeozems, Umbrisols
anthropogenic soils WS, 2
anthrosols, Technosols
physical characteristics, 4
andosols, vertisols, nitisols, arenosols
Boreal and Polar zone, 3
Cryosols, Histosols, Podzols
dry areas except steppe climates, 5
durisols, calcisols, gypsisols, solonchaks, solonetz
leptosols
L. leto- thin; fine, limited soil formation
very shallow, over hard rock or highly calcareous material or deeper extremely gravelly soil
regosols
G. rego- blanket, limited soil formation
very weakly developed mineral soil in unconsolidated materials, extensive in eroding lands
fluvisols
L. Fluvi, river, limited soil formation
weakly developed, Sedimentary stratification, water borne sediments, flood plains rivers, and the shorelines of lakes and seas.
cambisols
L. Cambiare, to change, limited soil formation
brownish discoloration below the surface horizon, to mark the beginning of pedogenesis.
gleysols
R. clay, oxygen deficiency wetland soil (hydric soil), saturated with groundwater, reduction of Fe and Mn leads predominantly to grayish hues
stagnosols
L. stagnare, to flood, oxygen deficiency
Stagnosols have mottles in the topsoil and subsoil, accompanied in some cases by concretions and/or bleaching.
planosols
L. planus, flat, oxygen deficiency
Bleached, light‐colored, eluviated surface horizons that show signs of periodic water‐logging
luvisols
L. luere, to wash, higher clay subsoil
migrated from the upper part of the profile, generally grayish in color
alisols
L. aluminium, alum, higher clay subsoil
strongly acid, generally unproductive soils, with accumulated high activity clays in their subsoils
lixisols
L. lixivia, washed‐out substances. higher clay subsoil
clay has washed out of an upper, down to a lower horizon. The clays are of low activity, and a moderate to high level of base saturation
acrisols
L. acris, sour, higher clay subsoil
low base saturation of the cation exchange capacity at pH 7.0
well‐defined B horizon, with a blocky, prismatic, granular or massive structure
albeluvisols
L. albus, white, L. eluere, to wash out, higher clay subsoil
a horizon of clay illuviation, an irregular upper boundary, deep tongues of bleached soil material penetrating the clay horizon.
