Show simple item record

dc.contributor.authorMeredith, Kelly Robynen
dc.date.accessioned2014-03-14T20:30:58Zen
dc.date.available2014-03-14T20:30:58Zen
dc.date.issued2007-12-12en
dc.identifier.otheretd-01202008-125512en
dc.identifier.urihttp://hdl.handle.net/10919/31006en
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
dc.publisherVirginia Techen
dc.relation.haspartK_Meredith_Thesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectReclamationen
dc.subjectRevegetationen
dc.subjectBulk Densityen
dc.subjectBiosolidsen
dc.titleThe Influence of Soil Reconstruction Methods on Mineral Sands Mine Soil Propertiesen
dc.typeThesisen
dc.contributor.departmentCrop and Soil Environmental Sciencesen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineCrop and Soil Environmental Sciencesen
dc.contributor.committeechairDaniels, W. Leeen
dc.contributor.committeememberGrisso, Robert D.en
dc.contributor.committeememberAlley, Marcus M.en
dc.contributor.committeememberGalbraith, John M.en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01202008-125512/en
dc.date.sdate2008-01-20en
dc.date.rdate2008-02-13en
dc.date.adate2008-02-13en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record