M. S. Cheema, M. Akhtar and Liaquat Ali
Journal of Agronomy 2 ( 4 ): 185 - 189 , 2003
M. Aslam, Manzoor Hussain, M. Akhtar, M. S. Cheema and Liaquat Ali
Journal of Agronomy 2 ( 4 ): 190 - 194 , 2003