The program to build food security can be applied to several aspect such as food safety, food availability, affordability, and food distribution. The program  is carried out so that humans can manage natural resources for the availability of food needs in a sustainable manner. One of the most important foods is fish. Fish contains high protein, omega 3 fatty acids, and other nutritional. The purpose of this study was to determine the potential of fish diversity in the Kedung Ombo reservoir as a provider of sustainable food needs. The research method uses survey and literature review. Based on the results of the literature study, it was found that there were 13 types of fish and came from 7 families. The fish species include parrot fish (Oreochromis niloticus), tilapia fish (Oreochromis mossambicus), Catfish (Pangasius sutchi), tawes fish (Barbodes gonionatus) and betutu fish (Oxyeleotris marmorata). In fish farming activities, one of them must be carried out properly, one of which is by paying attention to the concept of inland public waters in a sustainable manner so that its easy for the community to meet their food needs

Castanopsis argentea (Blume) A.DC. has the local name saninten. This plant is one of the woody plants that has the potential to be developed because it is beneficial for wildlife to nest and is used in reforestation. The seeds of this plant can be used for food by boiling and burning. This plant must be preserved so that it does not become extinct. However, the propagation, so it must use the technique of propagation through tissue culture. This study aims to determine the best sterilization technique for in vitro culture of C. argentea. Eight methods of explant sterilization have been carried out in this study. Methods 1-4 do not use ascorbic acid immersion, while methods 5-8 use the addition of ascorbic acid. Based on observations, it is known that the best sterilization is in the 8th method because the level of contamination and browning is lower than other methods, namely on the fifth day after planting only 20%. The 8th method is graded sterilization. In graded sterilization, explants were gradually immersed in 10% NaOCl, 20% NaOCl, and 30% NaOCl, respectively. Multilevel sterilization is the most effective method of sterilization to reduce contamination and browning. Ascorbic acid acts as an antioxidant and reduces contamination in the enzymatic browning reaction. The combination of sterile substances, time, sequence, and method of immersion affects the sterility of explants.