C. I. Duruigbo, J. C. Obiefuna and E. U. Onweremadu
International Journal of Soil Science 2 ( 2 ): 154 - 158 , 2007
I. I. Ibeawuchi, J. C. Obiefuna and M.C. Ofoh
Journal of Agronomy 4 ( 4 ): 304 - 307 , 2005
E. U. Onweremadu, E. T. Eshett, M. C. Ofoh, M. I. Nwufo and J. C. Obiefuna
Journal of Plant Sciences 3 ( 1 ): 43 - 51 , 2008
I.I. Ibeawuchi, M. C. Ofoh, M. I. Nwufo and J. C. Obiefuna
Journal of Plant Sciences 2 ( 4 ): 374 - 386 , 2007
I. I. Ibeawuchi, J. C. Obiefuna, M. C. Ofoh, G. O. Ihejirika, C. T. Tom, E. U. Onweremadu and C. C. Opara
Pakistan Journal of Biological Sciences 8 ( 2 ): 215 - 219 , 2005