ILLUVIATED CLAY IN SANDY PODZOLIC SOILS OF NEW BRUNSWICK

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Abstract
Satisfactory uniformity with depth was estabished in sandy materials of marine, till and alluvial origin and a Podzolic soil was sampled in each of the materials. Marked maxima of clay, organic C, and pyrophosphate-extractable Fe and Al occurred within the podzolic B horizon of each soil. These maxima were least pronounced in the youngest soil developed in alluvium. In general, organic C and pyrophosphate Fe maxima occurred above clay and pyrophosphate Al maxima. Calculations of gains and losses of constituents showed marked gains of clay, organic C and extractable Fe and Al in the podzolic B horizons. Though weakly oriented, silt and clay cutans occurred on some grains in the B horizons of these soils, micromorphological evidence was not conclusive in indicating clay illuviation. The results are interpreted as indicating that clay was probably translocated and deposited with organic complexes of Fe and Al in these acid, sandy soils.