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

New Forests volume 7, pages 331–344 (1993)Cite this article

Abstract

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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Authors and Affiliations

  1. Northeastern Forest Experiment Station, USDA Forest Service, 03824, Durham, NH, USA

    L. O. Safford

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  1. M. M. Czapowskyj
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  2. L. O. Safford
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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). https://doi.org/10.1007/BF00036753

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  • DOI: https://doi.org/10.1007/BF00036753

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