Selection thinning in young-growth Douglas-fir (a 6-year progress report).

Abstract

During the spring of 1949, an experiment to compare the effects of selection thinning and low thinning was established on the King Creek holdings of the St. Paul and Tacoma Lumber Company in Pierce County, Washington. Although the study was designed primarily to test selection thinning, effects of a modified low thinning and no thinning under comparable conditions were also provided for. The complete study consists of three separate blocks, each of which demonstrates one of the above treatments. However, data are as yet generally insufficient for significant comparisons; consequently, the scope of this report is limited to current progress on the selection thinning block.

Citation

Dimock, Edward J., II. 1956. Selection thinning in young-growth Douglas-fir (a 6-year progress report). PNW Old Series Research Notes No. 126, p. 1-6