PROFILE STUDIES OF NORMAL SOILS OF NEW YORK

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Abstract
The major horizons of 6 profiles forming a sequence from well-developed gray-brown podzolic to well-developed brown podzolic were studied in thin section. In the B horizon of the modal gray-brown podzolic profile strong concns. of clays having a high degree of optical continuity were found as thick coatings on the nuciform aggregates. Distinct evidence of destruction of such clay bodies was observed (a) in the uppermost part of the B horizon of the modal gray-brown podzolic soil, (b) extending deeply into the B horizon of the intergrades, and (c) strongly expressed throughout the lower horizons of the well-developed brown podzolic soil. In the last profile these clayey remnants were visible only under high magnification, suggesting a "fossil" B horizon beneath the characteristic B horizon of a brown podzolic soil. These observations are interpreted as evidence that a brown podzolic solum will develop in a former gray-brown podzolic soil in central and western New York and support the previously announced hypothesis that brown podzolic soils are normal for the region.

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