Polymorphic site index curves for shortleaf pine in the Ouachita Mountains

David L. Graney; Harold E. Burkhart

Treesearch

Polymorphic site index curves for shortleaf pine in the Ouachita Mountains

Informally Refereed

Authors:

David L. Graney, Harold E. Burkhart

Year:

1973

Type:

Research Paper

Station:

Southern Research Station

Source:

USDA Forest Service

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Download (PDF 3.94 MB): https://research.fs.usda.gov/download/treesearch/80722.pdf

Abstract

Polymorphic site index curves for shortleaf pine at ages 25 and 50 were derived from stem analysis data collected in the Ouachita Mountain Province. Curve shape was significantly related to site quality. The polymorphic curves are preferable to standard anamorphic curves for stand ages less than 30 to 40 years, especially for site indices greater than 60. The polymorphic curves produce unbiased estimates for all ages and site qualities and they reduce estimation errors.

Keywords

Pinus echinata, productivity, growth patterns, stem analysis

Citation

Graney, David L.; Burkhart, Harold E. 1973. Polymorphic site index curves for shortleaf pine in the Ouachita Mountains. Res. Pap. SO-85. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 12 p.