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Filtering by: Creator Kurtz, Andrew Remove constraint Creator: Kurtz, Andrew Advisor Perakis, Steven S. Remove constraint Advisor: Perakis, Steven S.

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  • Nitrogen and phosphorus dynamics during decomposition of multiple litter types in temperate coniferous forests

    Creator:
    van Huysen, Tiffany L.
    Abstract:
    Litter nutrient dynamics contribute significantly to biogeochemical cycling in forest ecosystems. These dynamics may be influenced by site attributes, litter nutrient concentrations, and soil nutrient availability either independently or synergistically. Litter nutrient dynamics were examined in two decomposition studies in temperate coniferous forests of Oregon. I used ¹⁵N-labelled litter of...
    Resource Type:
    Dissertation
    Full Text:
    -fluoride extraction (Bray and Kurtz 1945). Twenty-five mL extractant (NH4F-HCL) was added to a 5 g

  • Tree species-soils relationships in old-growth forests of the Oregon Coast Range

    Creator:
    Cross, Alison
    Abstract:
    Tree species directly and indirectly affect soil nutrient cycles. I sought to characterize soils and foliage associated with four common canopy tree species (Douglas-fir, western hemlock, western redcedar, and bigleaf maple) in mixed-species old-growth forests of the Oregon Coast Range and to determine whether and how soils differ among the...
    Resource Type:
    Masters Thesis
    Full Text:
    (Bray and Kurtz 1945). Bray-1 (0.03 N NH4F-0.025 N HCl) extracting solution solubilizes P adsorbed to