اثر کوتاه مدت سیستم ها و شدت های چرا بر تغییرات وزن دام

Assistant Professor, Range Research Division, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

Professor, Department of Rehabilitation of Arid and Mountainous Regions, Faculty of Natural Resources, University of Tehran, Karaj, Iran