Landscape Position and Tillage effects on Carbon Sequestration.
(5242)
Authors:
M.D. Poteet* - Penn State University S.W. Duiker - Penn State University
Abstract:
Different tillage practices implemented over the long-term can impact the levels of soil organic carbon (SOC) that may be sequestered. To fully understand the dynamics of SOC quantities across a landscape, intensive sampling must be conducted in areas of erosion and deposition. This experiment looked at four different forms of tillage, which have been in place for 25 years, in a field which has been planted in continuous corn. There are 3 mapped soil types in the field with surface textures of silt loam. The tillage methods studied were done in spring and included no-till (NT), zone tillage (ZT), chisel plow (CP), and moldboard plow (MP). Landscape positions sampled were shoulder/summit areas (Sh), sideslopes (Ss), and areas of deposition (Dep). Samples were taken across the field at three depths for each location. The three depths were 0-5cm, 5-20cm, and 20-100cm. SOC was calculated based on depth and equivalent mass bases. Bulk densities were found not to be significantly different among the four treatments. NT and ZT were found to have significantly higher SOC levels than CP and MP at the 0-5cm and 5-20cm depths. Landscape positions did not show a significant difference in SOC levels.
Speaker Information: Michael Poteet, Penn State University, 116 ASI Building University Park, Pa 16802, State College, PA 16802; Phone: 814-863-7661; E-mail: [email protected]
Session Information: Wednesday, November 3, 2004, 2:55 PM-5:15 PM Presentation Start: 2:55 PM
