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    Author(s): M.A. Radwan; Dean S. DeBell
    Date: 1980
    Source: Res. Pap. PNW-RP-267. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p
    Publication Series: Research Paper (RP)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.07 MB)

    Description

    Twelve different nitrogen (N) fertilizer treatments were tested on potted western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings. Fertilizers affected soil N and pH, and growth and foliar chemical composition of seedlings. Urea plus N-Serve and sulfur-coated urea appear more promising for promoting growth than other fertilizers tested. Results, however, do not explain reported variability in response of hemlock stands to N fertilization.

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    Citation

    Radwan, M.A.; DeBell, Dean S. 1980. Effects of different sources of fertilizer nitrogen on growth and nutrition of western hemlock seedlings. Res. Pap. PNW-RP-267. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p

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    Keywords

    Nitrogen fertilizer response, seedling growth, western hemlock, Tsuga heterophylla

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