Frothingham's Hardwood Cleaning at Looking-Glass Rock–43 Years Later

This pioneer cleaning study was established in 1923 near Looking-Glass Rock on the Pisgah National Forest to determine the feasibility of liberating suppressed yellow-poplar. Standing volumes at age 51 are presented for cleaned and uncleaned plots, as are periodic increments which ranged from 834 to 1,429 board feet per acre per year–from age 34 through 51. The study shows that Southern Appalachian timberland can regenerate successfully after clearcutting followed by fire even without cleaning.