SOME CHARACTERISTICS OF GRAY SOILS OF LOW BASE SATURATION FROM NORTHEASTERN BRITISH COLUMBIA

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Abstract
Very strongly acid soils of extremely low base saturation have developed under forest vegetation on Cretaceous marine shales in northeastern British Columbia. The soils have light-colored Ae horizons and fine-textured B horizons but the texture becomes finer in the C horizons. Particle size analyses, however, demonstrated that fine clay has accumulated in the B so that the soils have the requisite properties of Orthic Gray Wooded soils. The amount of clay accumulated in the Bt horizons appears to be small and the development of the Bt horizons, therefore, is minimal. The low exchangeable base content of the soils is due to the acidic nature of the parent materials.

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