Thirty-year Changes in Mineral Soil C in a Cumberland Plateau Forest as Influenced by Inorganic-N, Soil Texture, and Topography
| dc.contributor.author | Kiser, Larry Christopher | en |
| dc.contributor.committeechair | Kelly, J. Michael | en |
| dc.contributor.committeemember | Burger, James A. | en |
| dc.contributor.committeemember | Fox, Thomas R. | en |
| dc.contributor.department | Forestry | en |
| dc.date.accessioned | 2014-03-14T20:48:00Z | en |
| dc.date.adate | 2008-01-09 | en |
| dc.date.available | 2014-03-14T20:48:00Z | en |
| dc.date.issued | 2007-10-31 | en |
| dc.date.rdate | 2008-01-09 | en |
| dc.date.sdate | 2007-11-16 | en |
| dc.description.abstract | Increases in atmospheric C have resulted in concerns about global warming and interest in finding means to sequester atmospheric C through land management strategies. The purpose of this study was to (i) compare changes in mineral soil C after a 30-year interval and (ii) examine the role of inorganic-N, soil texture, and topography in these changes. Soil samples were collected at permanently identified points on the Camp Branch Watershed, a second growth oak forest on the Cumberland Plateau in central Tennessee, in July of 1976 and archived. These points were re-sampled in July of 2006 and both archived and new samples of the 0 to 10 cm increment of the mineral soil were analyzed for C and N using the same procedures. Paired comparisons revealed changes in C and N were distinct to each of the 8 soil series. Comparison of 2006 samples to 1976 samples indicated changes in C concentration ranged from -13.1% to +12.0%. Changes in C mass ranged from -11.3% to +8.3%. Increases in C were most closely associated with increases in the C/total-N ratio. C was positively correlated to exchangeable inorganic-N in 1976 (r2 = 0.387) and 2006 (r2 = 0.107). Regression analysis revealed C increased with increasing azimuth and decreasing elevation in 1976 (r2 = 0.140). C was predicted only by clay content in 2006 (r2 = 0.079) and exhibited a negative relationship. Since topography was no longer a predictor of mineral soil C in 2006, we speculate that changes in forest cover also influenced changes in mineral soil C. | en |
| dc.description.degree | Master of Science | en |
| dc.identifier.other | etd-11162007-160043 | en |
| dc.identifier.sourceurl | http://scholar.lib.vt.edu/theses/available/etd-11162007-160043/ | en |
| dc.identifier.uri | http://hdl.handle.net/10919/35725 | en |
| dc.publisher | Virginia Tech | en |
| dc.relation.haspart | Thesis_LCKISERrev.pdf | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | carbon sequestration | en |
| dc.subject | aggrading | en |
| dc.subject | temperate deciduous forest | en |
| dc.title | Thirty-year Changes in Mineral Soil C in a Cumberland Plateau Forest as Influenced by Inorganic-N, Soil Texture, and Topography | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | Forestry | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
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