Survival and Growth of Planted Douglas-Fir (Pseudotsuga menziesii (Mirb.) Franco) and Ponderosa Pine (Pinus ponderosa Dougl. ex Laws.) on a Hot, Dry Site in Southwest Oregon

After two growing seasons on a hot, dry site at low elevations in southwest Oregon, survival rates were 88 percent for 1+0 plug Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), 99 percent for 2+0 bareroot Douglas-fir, 91 percent for 1 +0 plug ponderosa pine (Pinus ponderosa Dougl. ex Laws.), and 98 percent for 2+0 bareroot ponderosa pine. Survival of the bareroots was significantly greater than that of the plugs (P = 0.05). Stress testing ranked all four stock types as excellent. Relative volume growth was greatest for the pine. The initially smaller 1+0 plug pine nearly equaled the size of the 2+0 bareroot Douglas-fir after 2 years. (Tree Planters' Notes 36(4):3-6; 1985)

Download this file:

Download this file

Details

Author(s): Ole T. Helgerson

Publication: Tree Planters' Notes - Volumes 36, Number 4 (1985)

Section: General

Volume: 36

Number: 4