Fertilizer is one of the priorities for the agricultural industry and it contributes about 15 to 30% in the cost structure of rice farming. Capacity of national urea production in Indonesia is about 8 million tons per year while the needs are about 9 million tons per year. According to the Ministry of Industry in 2015 urea production can be increased by 6% from the previous national urea production capacity. On the use of fertilizers in the field, however, lost of nutrients during fertilization in the field (paddy) occurs a lot, so the efficiency of fertilizer use is reduced partly due to nitrification and urease. Therefore, it needs innovation and technological development of efficient agricultural fertilizer currently need to modify fertilizers with coating technology of nitrification inhibitor on the surface of the fertilizer granules. In this study the nature polymers (latex and chitosan) are used as a raw material nitrification inhibitors, several studies have shown that chitosan has a performance as anti bacteria that can be applied in agriculture. The study of a material generally involves the characterization by SEM and FT-IR to determine the characteristics micrographics and molecular bonding group of materials including latex-chitosan. The results of the study nitrification inhibitor made from latex-derived chitosan found that optimum formula of latex-chitosan mixture is sample with the mixture of latex 20% and chitosan 80% and be compatible with the surface of agricultural fertilizer granule, and a layer of latex-chitosan capable of strengthening the structure of fertilizer granules when tested in water for 3 months. This latex-chitosan based fertilizer shown as slow release fertilizer (urea and NPK) and resistant to moisture.
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