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Needle-Air Temperature Differences of Douglas-Fir Seedlings and Relation to Microclimate

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Needle temperatures of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings on three exposed sites in southwest Oregon remained within 3°C of air temperature under conditions of cloudless skies in late summer. Needle-air temperature differentials were positive during the day, negative at night, and were nonlinearly related to air temperature. This nonlinear relation is discussed qualitatively with respect to the influence of changes in net radiation, vapor pressure deficit, windspeed, and stomatal resistance occurring throughout the day. Forest Sci. 30:635-644.

Keywords: Pseudotsuga menziesii; leaf temperature; reforestation

Document Type: Journal Article

Affiliations: Comstock Environmental Sciences, 4785 SW Riverside Drive, Albany, OR 97321

Publication date: September 1, 1984

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