Abstract This article gives an account of stand changes, increment, mortality, and natural regeneration on an area of 480 acres logged by the Forest Service in 1909 and again in 1939. All trees 4 inches and over d.b.h. were measured at 5-year intervals. The volume per acre after the first cutting was 3,542 hoard feet; after the second cut, under three silvicultural methods, the residual volume averaged 2,995 board feet. Mean annual net increment during 30 years averaged 81 board feet and mortality 21 board feet per acre. Gross increment rose to 134 board feet during the first decade, then declined steadily to 85 board feet in the last 5-year period. Mortality rose from 11 board feet in the first 5-year period to 36 in the last. Good reproduction has followed cutting. The land has returned a net annual income of 14 cents per acre above estimated cost of protection and essential administration. Since this yield is largely that of low-grade trees occupying less than half the land, much higher returns may be expected under intensive management.
Pearson et al. (Thu,) studied this question.