Evaluating indicators of land degradation in smallholder farming systems of western Kenya Waswa, Boaz S. ; Vlek, Paul L. G. ; Tamene, Lulseged D. ; Okoth, Peter ; Mbakaya, David ; Zingore, Shamie Abstract Publication: Geoderma Pub Date: March 2013 DOI: 10.1016/j.geoderma.2012.11.007 Bibcode: 2013Geode.195..192W