Type of Document Dissertation Author Li, Renssheng URN etd-10142005-135808 Title Nitrogen cycling in young mine soils in Southwest Virginia Degree PhD Department Crop and Soil Environmental Sciences Advisory Committee
Advisor Name Title No Advisors Found Keywords
- Soils Virginia Southwestern
- Mines and mineral resources Virginia Southwestern
Date of Defense 1991-06-05 Availability restricted Abstract
Deficiency of available nitrogen (N) is one of the major factors limiting the establishment of a long term self-sustaining vegetative community on mine soils. This investigation was conducted to study the nature of N form and dynamics in southwest Virginia mine soils.
Fresh mine spoils contained a large amount of indigenous N, ranging from 650 to 2500 mg/kg soil, which complicated N studies. Most of the indigenous N was "geologic N" which was unavailable to plants. The geologic N came from either 2:1 silicate minerals (fixed NH4+) or coal fragments (nonhydrolyzable organic N). Active N, consisting of hydrolyzable organic N and exchangeable N, comprised the minor fraction of indigenous N available to plants.
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