The purpose of the study was to assess the consequences of long-term (28-years) tillage and crop rotation systems on soil organic carbon sequestration with special emphasis on the most stable organic matter fraction, the humic substances. Organic carbon (OC) content of composite soil samples was determined by dry combustion (LECO CHN analyzer), by wet combustion (Walkley-Black method), by loss on ignition and by FTIR (Fourier Transform Infrared Spectroscopy). The molecular composition of the fractionated humic and fulvic acids was characterized by FTIR.
See more of SOM, C Dynamics, and GHG Emissions: II
See more of S06 Soil & Water Management & Conservation
See more of The ASA-CSSA-SSSA International Annual Meetings (November 6-10, 2005)