Institution: | (1) Soil Microbiology Department, Rothamsted Experimental Station, AL5 2JQ Harpenden, Herts., UK;(2) International Crops Research Institute for the Semi Arid Tropics (ICRISAT), Patancheru P.O., 502324 Andhra Pradesh, India;(3) Department of Biochemistry and Biological Sciences, Wye College, University of London, TN25 5AH Wye, Ashford, Kent;(4) Present address: Department of Agriculture, University of Queensland, QLD 4067 St. Lucia, Australia |