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    Author(s): M. A. Radwan; John S. Shumway; Dean S. DeBell
    Date: 1979
    Source: Res. Pap. PNW-RP-265. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
    Publication Series: Research Paper (RP)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.2 MB)

    Description

    Effects of manganese (Mn) on Douglas-fir grown in soil, with and without urea, and in nutrient solution were investigated. In addition, Mn sorption by forest soils was evaluated. Results show that Douglas-fir does not respond to added Mn and is quite tolerant to high Mn levels. Moreover, Mn sorption by soils is high. It is doubtful that Mn toxicity is of practical importance to production of Douglas-fir under forest conditions.

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    Citation

    Radwan, M. A.; Shumway, John S.; DeBell, Dean S. 1979. Effects of manganese and manganese-nitrogen applications on growth and nutrition of Douglas-fir seedlings. Res. Pap. PNW-RP-265. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

    Keywords

    soil manganese, nitrogen fertilizer response, seedling growth, Douglas-fir, Pseudotsuga menziesii

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