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Seasonal Weather Regimes Influence Interpretation of Pinus resinosa Foliar Analysis¹

ABSTRACT

A technique is described for quantifying the influence of seasonal precipitation and atmospheric temperature patterns (using degree-day summations) on annual foliar analysis data. The results of this are used to adjust for the influence of climatic variation on foliar data so as to obtain a better estimate of species and soils relations. For Pinus resinosa, a species with determinate growth characteristics, precipitation and degree-day summations over a portion of the previous snow-free season plus the same measures for the current snow-free season may be used to adjust annual foliar analysis data to improve these data for diagnostic purposes.

¹ Contribution of the Department of Silviculture Forest Influences, State University of New York College of Environmental Science and Forestry, Syracuse, NY 13210.

² Technical Research Assistant, Graduate Research Assistant, Research Consultant in Resource Sciences, and Professor of Forest Soil Science, respectively, SUNY. The assistance of Dr. William Stiteler College Biometrician, SUNY, is gratefully acknowledged.

Received for publication September 19, 1978. Accepted for publication November 20, 1978.