Regeneration of Douglas-fir cutblocks on the Six Rivers National Forest in northwestern California

R. O. Strothmann

Treesearch

Regeneration of Douglas-fir cutblocks on the Six Rivers National Forest in northwestern California

Informally Refereed

Authors:

R. O. Strothmann

Year:

1979

Type:

Research Paper

Station:

Pacific Southwest Research Station

Source:

Res. Pap. PSW-RP-142. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station; 9 p

Download (PDF 1.90 MB)

Download (PDF 1.90 MB): https://research.fs.usda.gov/download/treesearch/29931.pdf

Abstract

A survey of 61 cutblocks planted since 1964 evaluated stocking of conifers (trees 1 foot tall or taller) on 2-milacre quadrats. Overall stocking percentage averaged 42.2 and ranged from 15 to 8 1. Overall number of trees per acre averaged 396. In the regression model, based on 36 cutblocks, better stocking was associated with high site class, northerly aspect, elevation below 3000 feet, and tractor (rather than cable) logging. Stocking tended to increase with increasing age of plantation, but decreased with increasing size of cutblocks.

Keywords

artificial regeneration, planting, plantations, stocking, Six Rivers National Forest, California, Douglas-fir, Pseudotsuga menziesii

Citation

Strothmann, R. O. 1979. Regeneration of Douglas-fir cutblocks on the Six Rivers National Forest in northwestern California. Res. Pap. PSW-RP-142. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station; 9 p