Agricultural and Biosystems Engineering, University of Gadjah Mada 1981-1989 Undergraduate thesis title: Soil Compaction Induced by Tractor and Transportation Truck on Regosol Soil. Agricultural Engineering, Asian Institute of Technology, Bangkok, Thailand 1991-1992. Graduate thesis title: Development of a Rice Panicle Harvester. Biosystems Engineering, Rheinisch-Fredrich-Wilhems Universität, Bonn, Germany 1995-2000 Dissertation title: Untersuchung zum Lagerverhalten von Kartoffelknollen aus organischem Landbau mit Hilfe einer Gasstoffwechselmessanlage (GWM)
Agricultural and Biosystems Engineering, University of Gadjah Mada 1981-1989 Undergraduate thesis title: Soil Compaction Induced by Tractor and Transportation Truck on Regosol Soil. Agricultural Engineering, Asian Institute of Technology, Bangkok, Thailand 1991-1992.
