El-Jack, 1991. Sudan J. Anim. Prod., 4 (2): 113-120 Document reference El-Jack, E. M., 1991. The effect of three different systems on the performance of young growing heifers in the Gezira. Sudan J. Anim. Prod., 4 (2): 113-120Citation key El-Jack, 1991Datasheets Butterfly pea (Clitoria ternatea)