{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/114622"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/114622","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"The impact of harvesting and site preparation on nutrient dynamics, soil erosion and stream water quality in the Virginia Piedmont","abstract":"The impacts of clearcut harvesting and four intensities of mechanical site preparation were evaluated in the Virginia Piedmont using gauged watersheds. The four treatments were: 1) control, 2) chop and burn, 3) shear-disc, and 4) shear, rake-pile, disc. A combination of soil solution, streamwater and soil sampling and a series of soil incubations, both laboratory and <i>in situ</i> monitored changes in the treatment areas following site preparation. Available nitrogen reserves decreased substantially in the shear, pile, disc treatment area but increased in the chop and burn and shear-disc treatment areas following site preparation. Increased soil moisture and temperature following disturbance stimulated nutrient mobilization. Soil solution KCI extractable and <i>in situ</i> soil incubations all indicated that nitrogen mineralization was greater in the site prepared watersheds. Among the site prepared areas, treatment response followed a site preparation intensity dependent gradient. Fifteen, 26, 20 and 45% respectively of the available nitrogen reserves were mineralized within one year following site preparation in the control, chop and burn, shear-disc and shear, pile, disc watersheds. Streamwater nutrient export also increased following disturbance. Soil erosion increased in a 1:6:60 proportion in the chop and burn, shear-disc and shear, pile, disc treatment areas. Higher soil erosion led to increased sediment export in the site prepared areas.","abstract_html":"The impacts of clearcut harvesting and four intensities of mechanical site preparation were evaluated in the Virginia Piedmont using gauged watersheds. The four treatments were: 1) control, 2) chop and burn, 3) shear-disc, and 4) shear, rake-pile, disc. A combination of soil solution, streamwater and soil sampling and a series of soil incubations, both laboratory and &lt;i&gt;in situ&lt;/i&gt; monitored changes in the treatment areas following site preparation. Available nitrogen reserves decreased substantially in the shear, pile, disc treatment area but increased in the chop and burn and shear-disc treatment areas following site preparation. Increased soil moisture and temperature following disturbance stimulated nutrient mobilization. Soil solution KCI extractable and &lt;i&gt;in situ&lt;/i&gt; soil incubations all indicated that nitrogen mineralization was greater in the site prepared watersheds. Among the site prepared areas, treatment response followed a site preparation intensity dependent gradient. Fifteen, 26, 20 and 45% respectively of the available nitrogen reserves were mineralized within one year following site preparation in the control, chop and burn, shear-disc and shear, pile, disc watersheds. Streamwater nutrient export also increased following disturbance. Soil erosion increased in a 1:6:60 proportion in the chop and burn, shear-disc and shear, pile, disc treatment areas. Higher soil erosion led to increased sediment export in the site prepared areas.","abstract_has_math":false,"creators":["Fox, Thomas R."],"institution":"Virginia Polytechnic Institute and State University","degree_name":"M. S.","degree_level":"masters","degree_discipline":"Forestry","degree_department":"Forestry","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1984,"date_issued":"1984","date_published":"1984","updated_at":"2026-07-22T22:20:37Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/114622","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Forestry"]},{"key":"dc:creator","label":"Author","values":["Fox, Thomas R."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-04-20T14:53:17Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-04-20T14:53:17Z"]},{"key":"dc:date.issued","label":"Date","values":["1984"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Forestry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M. 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A combination of soil solution, streamwater and soil sampling and a series of soil incubations, both laboratory and <i>in situ</i> monitored changes in the treatment areas following site preparation. Available nitrogen reserves decreased substantially in the shear, pile, disc treatment area but increased in the chop and burn and shear-disc treatment areas following site preparation. Increased soil moisture and temperature following disturbance stimulated nutrient mobilization. Soil solution KCI extractable and <i>in situ</i> soil incubations all indicated that nitrogen mineralization was greater in the site prepared watersheds. Among the site prepared areas, treatment response followed a site preparation intensity dependent gradient. Fifteen, 26, 20 and 45% respectively of the available nitrogen reserves were mineralized within one year following site preparation in the control, chop and burn, shear-disc and shear, pile, disc watersheds. Streamwater nutrient export also increased following disturbance. Soil erosion increased in a 1:6:60 proportion in the chop and burn, shear-disc and shear, pile, disc treatment areas. Higher soil erosion led to increased sediment export in the site prepared areas."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M. S."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The impact of harvesting and site preparation on nutrient dynamics, soil erosion and stream water quality in the Virginia Piedmont"]}]}],"canonical_facts":{"dc:contributor.department":["Forestry"],"dc:creator":["Fox, Thomas R."],"dc:date.accessioned":["2023-04-20T14:53:17Z"],"dc:date.available":["2023-04-20T14:53:17Z"],"dc:date.issued":["1984"],"dc:description.abstract":["The impacts of clearcut harvesting and four intensities of mechanical site preparation were evaluated in the Virginia Piedmont using gauged watersheds. The four treatments were: 1) control, 2) chop and burn, 3) shear-disc, and 4) shear, rake-pile, disc. A combination of soil solution, streamwater and soil sampling and a series of soil incubations, both laboratory and <i>in situ</i> monitored changes in the treatment areas following site preparation. Available nitrogen reserves decreased substantially in the shear, pile, disc treatment area but increased in the chop and burn and shear-disc treatment areas following site preparation. Increased soil moisture and temperature following disturbance stimulated nutrient mobilization. Soil solution KCI extractable and <i>in situ</i> soil incubations all indicated that nitrogen mineralization was greater in the site prepared watersheds. Among the site prepared areas, treatment response followed a site preparation intensity dependent gradient. Fifteen, 26, 20 and 45% respectively of the available nitrogen reserves were mineralized within one year following site preparation in the control, chop and burn, shear-disc and shear, pile, disc watersheds. Streamwater nutrient export also increased following disturbance. Soil erosion increased in a 1:6:60 proportion in the chop and burn, shear-disc and shear, pile, disc treatment areas. Higher soil erosion led to increased sediment export in the site prepared areas."],"dc:description.degree":["M. S."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/114622"],"dc:language.iso":["en"],"dc:publisher":["Virginia Polytechnic Institute and State University"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["The impact of harvesting and site preparation on nutrient dynamics, soil erosion and stream water quality in the Virginia Piedmont"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Forestry"],"thesis:degree_level":["masters"],"thesis:degree_name":["M. S."],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:20:37Z"}