Soil aggregation and total diversity of bacteria and fungi in various Tillage systems of sub-humid and semi-arid Kenya - Kihara, Job Maguta; Martius, Christopher; Bationo, B. André; Thuita, Moses N.; Lesueur, Didier; Herrmann, Laetitia; Vlek, Paul L.G.; Amelung, Wulf (Elsevier, 2012)