Effects of spacing on loblolly pine in Hawaii after 11 years

Craig D. Whitesell

Treesearch

Effects of spacing on loblolly pine in Hawaii after 11 years

Informally Refereed

Authors:

Craig D. Whitesell

Year:

1974

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-295. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

Download (PDF 278 KB)

Download (PDF 278 KB): https://research.fs.usda.gov/download/treesearch/30992.pdf

Abstract

The optimum spacing interval at which to plant loblolly pine (Pinus taeda L.) is being studied on Maui, Hawaii. Four spacings are being tried: 6,8, 10, and 12 feet. Measurements 11 years after the plots were set up show that (a) survival rates exceeded 94 percent, (b) average d.b.h. ranged from 6.4 inches at the 6-foot spacing to 9.8 inches in the 12-foot spacing; (c) basal area ranged from 168 sq. ft. per acre in the 12-foot spacing to 278 sq. ft. per acre in the 6-foot spacing; (d) spacing did not markedly affect height growth; and (e) percent of stem in live crown ranged from 44 percent, in the 6-foot spacing, to 63 percent, in the 12-foot spacing.

Keywords

Pinus taeda, Hawaii, species trials, spacing, seedling survival, diameter increment, basal area, height increment

Citation

Whitesell, Craig D. 1974. Effects of spacing on loblolly pine in Hawaii after 11 years. Res. Note PSW-RN-295. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p