A risk classification for beech (Fagus grandifolia Ehrh.) based on tree characteristics before the onset of the beech bark disease indicated that the crown widths in relation to DBH of trees that died were narrower than the crowns of survivors. Quantitative information on beech trees in the central Adirondack Region of the New York State before and during the development of the beech bark disease was available which included repeated measurements (1954–1976) of fifteen tree variables on 417 beech trees. A risk classification was developed which separated the trees by diameter and condition with a high (0.6), medium (0.3), and low (0.05) relative probability of mortality. The classification should improve the ability to separate those trees that are apt to die within a short period of time From those trees which are apt to survive.
A 70-year-old thinned northeastern Fagus-Betula-Acer stand in the Adirondack Mountains of New York was fertilized with varying combinations of N, P, K and lime. Acer saccharum Marsh. and Betula alleghaniensis Brit. foliage was collected periodically during the frost-free season and analyzed for foliage areas and weights, and levels of ash, N, P, K, Ca, Mg. Comparisons were made within species, and among treatments, expressed as concentrations on dry weight and ash bases, and as contents on per leaf weight and area bases. Elemental composition trends over time were examined to determine treatment effects and optimum sampling period.
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