Variations in the inorganic composition of inner bark and needles of loblolly pine with tree height and soil series

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Abstract
A survey was made of the concentration of N, P, K, Ca, Mg, Al, Mn, Zn, Fe, and Cu in inner bark and needles of loblolly pines and the soils in which they grew. Concentrations of K, Al, and Mn in inner bark differed significantly with plots on four soils. However, needle samples seemed to reflect differences in the nutrient status of the soil more readily. Concentrations of N, K, Ca, Mg, Al, Mn, and Zn in inner bark showed statistically significant variation with height of sample on the trunk. Correlations between concentrations of N, K, Ca, Al, and Mn in inner bark and needles on the same tree were significant.

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