This study determined the effect of probiotics prevared from Kumpai Tembaga (Hymenachne actigluma) to the weight percentage of internal organs of male layer chickens. This research lasted for two months in the Poultry Experimental station and Nutrisi dan Makanan Ternak Laboratory Departement of Animal Husbandry Technology and Industry, Animal Husbandry Study Program, Faculty of Agriculture, Sri…