In the determination of carbon contents in organic residues, analytical methods for soils are frequently employed without adequate calibration. Thus, methods capable to determine the levels of C and organic matter (OM) in organic residues must be tested and calibrated, using as a reference the dry combustion method. The objectives of this study were to evaluate methods for determining the levels of total carbon (TC), organic carbon (OC) and OM in organic residue samples; to determine mathematical equations for the […]

The soil C content has been determined most frequently by wet combustion methods. More recently, however, the dry combustion method has been used as the reference method for soil C determination. The main purpose of this study was to compare three C determination methods for soils under eucalypt plantations in southeastern Brazil. Samples of different soil types and located under distinct climate conditions were collected. Soil C contents were determined by two wet (Walkley-Black and Yeomans & Bremner) and one […]