Incidence of Compression Wood and Stem Eccentricity in Lodgepole Pine of North America

摘要

Trees measuring 76 mm d.b.h. (diameter at base height) had higher stem-average percentage of compression wood than those 152 mm or 228 mm d.b.h. Latifolia had less compression wood (5.5 percent) than murrayana (7.7 percent). In both varieties, stem sections from 45 through 50 degrees latitude were proportionally more free of compression wood than sections from other latitudes. Transverse stem sections typically displayed a main body of compression wood opposite an eccentrically located pith. Cross sections averaged most elliptical in trees from 57.5 and 60 degrees latitude.