@PROCEEDINGS {WENDT:2004a, title = {Measuring soil change: paper presented at the Training Program on DSSAT Version 4: assessing crop production, nutrient management, climatic risk and environmental sustainability with simulation models, 23-28 August 2004, Arusha, Tanzania}, editor = {Wendt, J. }, year = {2004}, month = {August}, note = {Soil Fertility; Learning Material}, }