Affiliation: | Area de Microbiología, Especialidad de Edafología, IRENAT, Colegio de Postgraduados, Montecillo Mexico 56230 Mexico;;Department Soil Science, University of Reading, PO Box 233, Reading RG6 6DW, UK;;International Institute of Biotechnology, 1/13 Innovation Building 1000, Sittingbourne Research Centre, Sittingbourne, Kent ME9 8HL, UK;;Department of Plant and Soil Science, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen AB24 3UU, UK |