Full Length Research Paper
Authors
Boniface H. J. Massawe
Department of Soil and Geological Sciences, Sokoine University of Agriculture, P. O. Box 3008, Morogoro, Tanzania.
Abel K. Kaaya
Department of Soil and Geological Sciences, Sokoine University of Agriculture, P. O. Box 3008, Morogoro, Tanzania.
Brian K. Slater
School of Environment and Natural Resources, The Ohio State University, 210 Kottman Hall, 2021 Coffey Road, Columbus, OH 43210, USA.
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