Thesis (M.S.)-- American University of Beirut, Department of Agricultural Sciences, 2013.
Advisor : Dr. Mustapha Haidar, Professor, Agricultural Sciences ; Members of Committee : Dr. Isam Bashour, Professor, Agricultural Sciences ; Dr. Adib Saad, Professor, Agricultural Sciences ; Dr. Salwa Tawk, Research Associate, Agricultural Sciences.
Includes bibliographical references (leaves 52-67)