Distribution of organic carbon in physical fractions of soils as affected by agricultural management. Biology and Fertility of Soils. 46(6):543-554.. 2010.
Evaluation of structural chemistry and isotopic signatures of refractory soil organic carbon fraction isolated by wet oxidation methods. Biogeochemistry. 98(1-3):29-44.. 2010.
Nitrogen fertilization and cropping system impacts on soil properties and their relationship to crop yield in the central Corn Belt, USA. Soil and Tillage Research. 98(2):120-129.. 2008.
Nitrogen fertilization and cropping systems effects on soil organic carbon and total nitrogen pools under chisel-plow tillage in Illinois. Soil and Tillage Research. 95(1-2):348-356.. 2007.