Fluctuations in the inorganic constituents of inner bark of loblolly pine with season and soil series

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Abstract
The concentrations of K, Ca, N, Mg, P, Al, Mn, Na, Zn, Fe, Cu, ash, and H2O in the inner bark of mature loblolly pines growing on three soil series were determined over a 1-year period. Concentrations of ash, H2O, Ca, Al, Mn, and Fe differed significantly among the trees on the three soil types. Most elements reached maximum concentrations in the fall and minimum concentrations in the spring. Ash, H2O, Mg, Mn, Zn, and Fe showed significant seasonal fluctuations. Because spring is a period of rapid transitions, late summer seems the most stable period in which to sample tissues from inner bark.

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