O.A. Akinsorotan, G.B. Adesiji, I. Ogunlade and A.O. Opabo
Agricultural Journal 2 ( 6 ): 667 - 671 , 2007
E. Ayanwuyi, l.O. Oladosu, I. Ogunlade and F.A. Kuponiyi
Pakistan Journal of Social Sciences 4 ( 3 ): 474 - 479 , 2007