N. Voncir, S. Mustapha, V.A. Tenebe, A.L. Kumo and S. Kushwaha
International Journal of Soil Science 3 ( 2 ): 62 - 68 , 2008
S. Mustapha, S. I. Yerima, N. Voncir and B. I. Ahmed
International Journal of Soil Science 2 ( 3 ): 197 - 203 , 2007
S. Mustapha, N. Voncir, S. Umar and N.A. Abdulhamid
International Journal of Soil Science 6 ( 4 ): 267 - 274 , 2011
S. Mustapha, N. Voncir and S. Umar
International Journal of Soil Science 6 ( 4 ): 275 - 281 , 2011
M. El-Harbawi, Z. Azhani Bt. Razali, S.M. Faiz B Sy M Fuzi and S. Mustapha
Journal of Applied Sciences 10 ( 24 ): 3319 - 3324 , 2010