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Site preparation, fertilization, and 10-year yields of hybrid poplar on a clearcut forest site in eastern Maine, USA

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Cuttings of two similar hybrid poplar clones were planted on a drum-chopped, chip-harvested clearcut in eastern Maine. The site had never been previously cleared for agriculture. The coarse loamy glacial till soils were acid (pH < 5.0) and moist—moderately well—to somewhat poorly drained. Control, lime (L), L nitrogen (N), L phosphorus (P), LNP, and LNP potassium (K) treatments were established. Competing woody vegetation was mowed once per year for the first three years on half the area. Each mowed treatment produced significantly greater hybrid poplar biomass than the corresponding unmowed treatment. After 10 years, the mowed+LNPK treatment attained the greatest total biomass, 45 Mgha-1, while the unmowed control attained the least, 2 Mgha-1. On mowed plots, L produced 4 times the biomass of control: 32 vs 8 Mgha-1. Unmowed plots with L and N produced about as much hybrid poplar biomass as the mowed control (8 Mgha-1). Mowing and L each improved survival as well as growth.

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  • Bernier, B. 1984. Nutrient cycling in Populus: a literature review with implications in intensively managed plantations. IEA/ENFOR. Joint Report C. Ottawa.

  • Bowersox, T.W. and Ward, W.W. 1976. Growth and yield of close-spaced hybrid poplars. For. Sci. 22: 449–454.

    Google Scholar 

  • Cunia, T. 1964. Weighted least squares method of construction of volume tables. For. Sci. 10: 180–191.

    Google Scholar 

  • Czapowskyj, M. M. 1970. Performance of hybrid poplars planted on anthracite coal mine spoils. Agron. Abstr. p. 158.

  • Czapowskyj, M. 1978. Hybrid poplar on two anthracite coal mine spoils: 10-year results. USDA For. Serv. Res. Note NE-267.

  • Czapowskyj, M. M., Robison, D. J., Briggs, R. D. and White, E. H. 1985. Component biomass equations for black spruce in Maine. USDA For. Serv. Res. Pap. NE-564.

  • Davis, G. 1964. Second-year results of hybrid poplar test plantings bitumenous strip mine spoils in Pennsylvania. USDA For. Serv. Res. Note NE-19.

  • Hansen, E.A. 1983. (Compiler). Intensive plantation culture: 12 years research. USDA For. Serv. Gen. Tech. Rep. NC-91.

  • Hansen, E. A., Moore, L., Netzer, D., Ostry, M., Phipps, H. and Zavitkovski, J. 1983. Establishing intensively cultured hybrid poplar plantations for fuel and fiber. USDA For. Serv. Gen. Tech. Rep. NC-78.

  • Hoyle, M.C. 1984. Plantation birch: what works what doesn't. J. For. 82: 46–49.

    Google Scholar 

  • Laing, F.M., Sendak, P.E. and Aleong, J. 1985. Species trials for biomass production on abandoned farmland. North. J. Appl. For. 2: 43–47.

    Google Scholar 

  • Martin, C. W. and Hornbeck, J. W. 1989. Revegetation after strip cutting and block clearcutting in northern hardwoods: a 10-year history. USDA For. Serv. Res. Rep. NE-625.

  • Ranney, J. W., Trimble, J. L., Wright, L. L., Perlark, JR. E., Wenzel, C. R. and Cushman, J. H. 1984. Short rotation woody crops program: Annual progress report for 1983. Oak Ridge Natl. Lab. Publ. ORNL-6085.

  • Safford, L.O. and Filip, S.M. 1974. Biomass and nutrient content of 4-year old fertilized and unfertilized northern hardwood stands. Can. J. For. Res. 4: 549–554.

    Google Scholar 

  • Statistical Analysis System Institute. 1982. SAS User's guide: Statistics, 1982 ed. SAS Institute, Inc. Cary, N.C.

    Google Scholar 

  • Steiner, K.C., Barbour, J.R. and McCormick, L.H. 1984. Response of Populus hybrids to aluminum toxicity. For. Sci. 30: 404–410.

    Google Scholar 

  • Trimble, Jr., G. R. 1963. Hybrid poplar grows poorly on acid spoil banks at high elevations in West Virginia, USDA For. Serv. Res. Note NE-7. 21.

  • Von Althen, F. W. 1981a. Planting studies with hybrid poplars and cottonwood in southwestern Ontario. Can. For. Serv., Great Lakes For. Res. Cent. Inf. Rep. O-X-332.

  • Von Althen, F. W. 1981b. Site preparation and post-planting weed control in hardwood afforestation: white ash, black walnut, basswood, silver maple, hybrid poplar. Can. For. Serv., Great Lakes For. Res. Cent. Inf. Rep. O-X-325.

  • Von Althen, F. W. 1983. Animal damage to hardwood regeneration and its prevention in plantations and woodlots of sourthern Ontario. Can. For. Serv., Great Lakes For. Res. Cent. Inf. Rep. O-X-351.

  • Young, H. E., Ribe, J. H. and Hoppe, D. C. 1979. A biomass study of the thinning potential and productivity of immature forest stands in Maine. Maine Life Sci. and Agri. Exp. Sta. Bull. No. 758.

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Czapowskyj, M.M., Safford, L.O. Site preparation, fertilization, and 10-year yields of hybrid poplar on a clearcut forest site in eastern Maine, USA. New Forest 7, 331–344 (1993).

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