Affiliation: | 1.Zambia Agriculture Research Institute, Mount Makulu Central Research Station, P/B 7, Chilanga, Lusaka, Zambia ;2.School of Agricultural Sciences, University of Zambia, Great East Road Campus, P.O Box 32379, Lusaka, Zambia ;3.Copperbelt University, Jambo Drive, Riverside, P.O. Box 21692, Kitwe, Zambia ;4.Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK ;5.School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire, LE12 5RD, UK ; |