Comparison of Soil Organic Carbon Recovery by Walkley-Black and Dry Combustion Methods in the Russian Chernozem

Abstract

This study compared soil organic carbon (SOC) recovery in the Russian Chernozem (a fine-silty, mixed, frigid Pachic Hapludoll) under four management regimes (native grassland, yearly-cut/grazed hay, continuous cropping, and continuously plowed fallow) and different depths by Walkley-Black and two dry combustion methods. The Walkley-Black method was different from both dry combustion methods and required a correction factor of 1.63 in all management regimes.