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A Pedological Characterization of Five Profiles in Gray Wooded Soils Area of Minnesota
Author(s) -
Harpstead Milo,
Rust R. H.
Publication year - 1964
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1964.03615995002800010046x
Subject(s) - soil water , deciduous , horizon , geology , soil science , mineralogy , soil horizon , cation exchange capacity , clay minerals , ecology , mathematics , biology , geometry
Abstract Five soil profiles from the Gray Wooded soils area of Minnesota were investigated in the field for morphological characteristics and in the laboratory for physical, chemical and mineralogical properties. This Gray Wooded soils area has a cool humid climate, mixed coniferous and deciduous vegetation and the profiles studied were developed in well‐drained glacial till of late Wisconsin age. X‐ray diffraction patterns revealed a wide variety of clay minerals. In most cases Ca 2+ was the dominant ion on the exchange complex. The upper portion of the B horizon was the most acid part of the profiles with pH values as low as 4.7. Various types of clay films, found to be well developed in the argillic B horizons, were investigated in thin‐sections. The degradation of peds in the A and B horizon was also studied with thin‐sections. A classification of these soils according to the 7th Approximation is suggested.