1980 tephra from Mount St. Helens: Spati
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D. B. Zobel; J. A. Antos
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Article
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1991
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Springer
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English
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Coarse pumice had a higher initial pH and less total N, less exchangeable K, Ca, and Mg, and less extractable B and S than finer textured layers. Tephra pH and concentrations of cations and S decreased rapidly with time, especially during the first 2 years in the finer layers. Total N, Bray-Kurtz P,