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Twenty Years of Growth in the Norris Watershed Plantations

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Examination of large-scale 20-year-old experimental plantations, established on eroding old fields near Norris, Tenn., indicated that shortleaf and eastern white pines had survived and grown very satisfactorily. Yellow-poplar planted in pure stands survived and grew acceptably; on the best sites it out-grew the pines; on poor sites its diameter increment was disappointing. Survival of white ash and baldcypress was fair to good, but after 20 years the trees were still in the seedling and sapling stages. Admixture by double rows with black locust had no effect on shortleaf pine but apparently stimulated height and diameter growth of yellow-poplar. Of various mixtures in groups, only sweetgum with yellow-poplar appeared satisfactory. Establishment and initial survival of seeded and planted upland oaks and seeded black walnut were very good, but nearly all trees were destroyed by rodents during the first five years. Growth of some surviving individuals is fair on average sites and remarkable in sinkholes, suggesting that the biggest problem in the artificial regeneration of these species in this locality is protection from mammalian depredation.
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Document Type: Journal Article

Affiliations: Staff of the Silviculture Laboratory, maintained by the Southern Forest Expt. Sta. Forest Service, U.S. Dept. Agric., in cooperation with the University of the South, Sewanee, Tenn.

Publication date: 1964-06-01

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