By Daniel I.   Adetumbi J.   in Euphytica

ISSN:0014-2336|140|3|189-196

Springer Publishing Company ‎(2004)‎

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By Daniel I. O.   Adetumbi J. A.   in Journal of Sustainable Agriculture

ISSN:1044-0046|28|2|25-40

Haworth Press‎(2006)‎

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