Evaluation of Two Eastern White Pine Site Index Equations at Biltmore Estate,North Carolina

摘要

The accuracy of two white pine (Pinus strobus L.) polymorphic site indexequations was compared with field data from three plots in a 100-year-old stand at Biltmore Estate, Asheville, NC. One equation was developed from New Hampshire data and the other from Southern Appalachian data. Tree height has been measured periodically on those plots between stand age 34 and 72 years. At 50 years, site index ranged from 54 to 73 feet (ft). Absolute deviations of actual from estimated site index averaged 2.5 ft for the Southern Appalachian equation and 2.7 ft for the New Hampshire equation.