A potatoes farmer ready to fertillize his land before plant seed potatoes at Dieng. Dieng plateau in Central Java, is part of the district of Banjarnegara and Wonosobo regency. It lies to the west of Mount Sindoro and Sumbing complex. Dieng is an active volcanic area and can be considered a giant volcano with a crater crater. Average altitude is about 2,000 m above sea level. Temperature range of