By Amaza Paul S.   Olayemi J. K.   in Applied Economics Letters

ISSN:1466-4291|9|1|51-54

Routledge Ltd‎(2002)‎

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By Kamara Alpha Yaya   Ellis-Jones Jim   Ekeleme Friday   Omoigui Lucky   Amaza Paul   Chikoye David   Dugje Ibrahim Yakamba   in Archives of Agronomy and Soil Science

ISSN:0365-0340|56|3|355-370

Taylor & Francis Ltd‎(2010)‎

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By Kamara Alpha Yaya   Ekeleme Friday   Omoigui Lucky   Menkir Abebe   Chikoye David   Dugje Ibrahim Yakamba   Abdoulaye Tahirou   Amaza Paul   in Archives of Agronomy and Soil Science

ISSN:0365-0340|55|2|125-145

Taylor & Francis Ltd‎(2009)‎

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