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A. Carlisle, A. H. F. Brown, E. J. White, The Nutrient Content of Tree Stem Flow and Ground Flora Litter and Leachates in a Sessile Oak (Quercus Petraea) Woodland, Journal of Ecology, Vol. 55, No. 3 (Nov., 1967), pp. 615-627
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Carlisle et al. (1967) studied this question.
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