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dc.contributor.authorMeredith, Kelly Robynen_US
dc.date.accessioned2014-03-14T20:30:58Z
dc.date.available2014-03-14T20:30:58Z
dc.date.issued2007-12-12en_US
dc.identifier.otheretd-01202008-125512en_US
dc.identifier.urihttp://hdl.handle.net/10919/31006
dc.description.abstractSignificant deposits of heavy mineral sands (primarily ilmenite and zircon) are located in Virginia in Dinwiddie, Sussex and Greensville counties. Most deposits are located under prime farmland, and thus require intensive reclamation when mined. The objective of this study was to determine the effect of four different mine soil reconstruction methods on soil properties and associated rowcrop productivity. Treatments compared were 1) Biosolids-No Tillage, 2) Biosolids-Conventional Tillage, 3) Lime+NPK fertilized tailings (Control), and 4) 15-cm Topsoil over lime+P treated tailings. Treated plots were cropped to corn (Zea Mays L.) in 2005 and wheat (Triticum aestivum L.) in 2006. Yields were compared to nearby unmined prime farmland yields. Over both growing seasons, the two biosolids treatments produced the highest overall crop yields. The Topsoil treatment produced the lowest corn yields due to relatively poor physical and chemical conditions, but the effect was less obvious for the following wheat crop. Reclaimed land corn and wheat yields were higher than long-term county averages, but they were consistently lower than unmined plots under identical management. Detailed morphological study of 20 mine soil pedons revealed significant root-limiting subsoil compaction and textural stratification. The mine soils classified as Typic Udorthents (11), Typic Udifluvents (4) and Typic Dystrudepts (5). Overall, mined lands can be successfully returned to intensive agricultural production with comparable yields to long-term county averages provided extensive soil amendment and remedial tillage protocols are implemented. However, a significant decrease (~25 to 35%) in initial productivity should be expected relative to unmined prime farmland.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartK_Meredith_Thesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectReclamationen_US
dc.subjectRevegetationen_US
dc.subjectBulk Densityen_US
dc.subjectBiosolidsen_US
dc.titleThe Influence of Soil Reconstruction Methods on Mineral Sands Mine Soil Propertiesen_US
dc.typeThesisen_US
dc.contributor.departmentCrop and Soil Environmental Sciencesen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineCrop and Soil Environmental Sciencesen_US
dc.contributor.committeechairDaniels, Walter Leeen_US
dc.contributor.committeememberGrisso, Robert D. Jr.en_US
dc.contributor.committeememberAlley, Marcus M.en_US
dc.contributor.committeememberGalbraith, John M.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01202008-125512/en_US
dc.date.sdate2008-01-20en_US
dc.date.rdate2008-02-13
dc.date.adate2008-02-13en_US


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