SOIL CHEMICAL PROPERTIES ANALYSIS IN THE LAND EVALUATION FOR HORTICULTURAL CROPS (A CASE STUDIES ON THE WESTERN MOUNT LAWU, TAWANGMANGU, CENTRAL JAVA PROVINCE, INDONESIA) - , Novi Rahmawati and Junun Sartohadi ([Yogyakarta] : Fak. MIPA Universitas Gadjah Mada, 2007)