Title page for ETD etd-10142005-135808


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.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[BTD] LD5655.V856_1991.L5.pdf 5.62 Mb 00:26:01 00:13:23 00:11:42 00:05:51 00:00:29
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.