Abstract Most American yield tables are based on natural stands that have always been dense or overdense. Most European yield tables are based on stands that were dense at establishment and were given the benefit of frequent thinnings starting at an early age. Neither of these patterns of stand history applies or is likely to apply for many years to most young stands in the Douglas-fir region. The author proposes an approach to density measurement applicable to stands having highly variable histories. The basic data are taken from intensively managed Douglas-fir in Denmark and Prussia and from both thinned and natural stands in the Douglas-fir region of western Washington. Some of the relationships found may apply in principle to other species growing in even-aged stands.
Philip A. Briegleb (Tue,) studied this question.