Abstract Ponderosa pine cut-over stands, even when conservatively logged, are generally deficient in immature age classes. The picture of continuous cutting is clouded by an uncertain period between final removal of the old timber and a time when the younger classes can support a logging program. As a means of bridging the gap between the old and the new, the holding of old reserves has limitations in slow growth and high mortality. The ultimate answer is to build an adequate young growing stock as rapidly as possible. This task, already long neglected, presents the main problem in management.
G. A. Pearson (Tue,) studied this question.