Dieng Volcanic Highland is one of the most intensive potato agricultural land in Indonesia, as well as frost disaster prone area. Frost indicated by appearance of frozen dew on the ground or vegetation surface due to cold temperatures during dry season. Frost causes damage to leaf tissue in potato plants, resulting crop failure and losses of up to tens of millions. Disaster management needs to be assess in order to achieve Disaster Risk Reduction (DRR) on agricultural land. This research aims to identify frost hazard areas based on local physical characteristics, analyze frost impacts on agricultural land, and provide preparedness recommendation to reduce the impact of frost disasters in Dieng Volcanic Highland. Research was conducted in Dieng Village, Wonosobo and Dieng Kulon Village, Banjarnegara. Method to assess hazard level was performed by spatial mapping technology using ArcGIS and comprehensive analysis using frost assessment through combinations of geomorphology, land use, proximity to water bodies and weather aspects. Dieng Volcanic Highland has a 125.59 hectare frost hazard areas, as many as 58.4 hectares of hazard areas are dominated by high level, while 24.84 hectares are moderate level and 42.95 hectares are low level. Cropland dominated by potato commodity has the highest hazard level, frost incident causing agricultural commodities to wither to death so that farmers experience losses. Frost losses in Dieng have a range from 800 thousand rupiah to over 155 million rupiah and only destructive on potato farm. In order to encourage agricultural resilience and reduce the loss of frost disasters, effort of preparedness can be done by passively and actively methods. Passive methods includes site selection, early warning system, shifting commodities, cropland modification, and appropriate calendar planting. Active methods includes frost modification using heaters, blower and sprinkle irrigation, and cropland covering using mulch, plastic or nets.

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Galur is one of the sub-district in KulonProgo Regency. Its land usage is dominated in intensive agricultural usage. The various type of the agricultural activities in study area has different type of land productivities depends on its land capabilities. Land capability analysis with landform approach become the base in this study to identify the sustainable “land utilization type” (LUT) and the land productivity optimal value in Galur sub- district. Observation, measurement, and interview was done by using the Land Classification and Land use Planning (LCLP) tool. Landforms that has productive value identified in this study are: alluvial plain (IId-3), beach ridge (IIIP-2), and beach (VIIIP). The usage of alluvial plain could be rice-(corn/nuts)-rice or could be replaced with rice-chili-rice. The usage of beach ridge could be the planting of plantation crops such as melon, onion, and chili, and could be the farming of goat and chicken. Land usage type in beach is left naturally because it has land capability type VIII (low capability).