By Ojikpong T. O.   Okpara D. A.   Muoneke C. O.   in Journal of Plant Nutrition

ISSN:0190-4167|32|3|367-381

Taylor & Francis Ltd‎(2009)‎

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By Ndukwe O. O.   Muoneke C. O.   Baiyeri K. P.   Tenkouano A.   in Journal of Plant Nutrition

ISSN:0190-4167|34|5|700-716

Taylor & Francis Ltd‎(2011)‎

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