Pruning Western Redcedar (EP 1065.03)
- To determine and compare the impact of pruning on the growth, yield and value of western redcedar, based on remeasurements and observations from permanent sample plots.
- To determine the rate of healing of pruning wounds.
The experiment was established in 1994 near Port McNeill. The treatments consisted of an unpruned control and crown removal of 20%, 30%, 40%, 50%, and 60% of the total tree height from the crown base, which was virtually equivalent to the tree base in this plantation. A randomized complete block design (RBCD) was used for this study, comprised of six pruning severity treatments and two blocks. Within each block, treatments were randomly assigned to a treatment unit that contained a single 0.1-ha core measurement plot with a surrounding 0.1-ha buffer zone. There were 75–100 measurement trees in each core plot.
- de Montigny, L., R. Negrave, and P.K. Ott. 2010. Effects of pruning severity on the growth of western redcedar after 12 years. In: A tale of two cedars. Int. Symp. on Western Redcedar and Yellow-cedar. C.A. Harrington (technical coordinator). U.S. Dep. Agric. For. Serv., Portland, Ore. Gen. Tech. Rep. PNW-GTR-828, pp. 103–108.