Hole, Francis Doan, 1913-2002 / Soils of Wisconsin
[Plates], pp. [Plate 1]-Plate 8
Page [Plate 1]
ALFISOL ORDER (Gray-Brown Podzolic, Gray Wooded soils; deciduous forest soils) MOLLISOL ORDER (Brunizems, Humic Gleys; soils with deep black epi- pedon, i.e. top- soil) INCEPTISOL ORDER (Low Humic Gleys; weakly developed soils) SPODOSOL ORDER (Podzols; coniferous forest soils) ENTISOL ORDER (Lithosols, Regosols, alluvial soils; primitive soils) Figure 5-1, in color. Circular key to the new USDA soil classification for Wisconsin, coded in color to indicate, in each instance, a key feature of the soil or environment. The very poorly drained organic soils, represented here in blue, are normally found saturated with water in hogs and marshes; the Fibrists are assumed to be the wetlest of the three suborders of Histosols. The poorly drained mineral soils (Aqualfs, Aquods. etc.) are colored green here to indicate the abundance of vegetation on them. Alluvial soils (Fluvents) and upland prairie soils (Udolls) are less wet, but even so support rather vigorous plant growth. The sands (Psamments) are droughtv; Ochrepts may be thought of as a degree less droughty. tmportant upland forest soils are portrayed in the three remaining suborders: Podzols (Orshods) commonly have reddish-brown B horizons, Boralfs have less of a reddish tinge in claycy B horizons, and ljdalfs have brown to yellowish-brown claycy B horizons. The chart may be visualized as a funnel with the wettest soils at the center and the driest ones at the periphery.
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