<![CDATA[Compound Fertilizer Formulation in Indonesia: Need for SSNM (Site Spesific Nutrient Management).The government had reduced fertilizer subsidy since 1st April 2010, which increased fertilizer price by 25-40%. Fertilizer price is predicted to further increasing, thus farmers must be more efficient in using fertilizerfor their rice field. Landholding for rice farmers in Indonesia is mostly small and varying. Farming practicesvary among farmers and among fields, therefore crop needs for nutrient inputs vary greatly among fields. Forthis reason we are suggesting the need for the formulation of up to three types of NPK fertilizers for rice inIndonesia: (a) NPK source with ratio about 1:1:1 as in Phonska, (b) NK source for application as topdressingto obtain high yield on land without application of crop residues and organic matter, or K soil is deficient, and(c) NP source with 1:1 ratio for N:P, for use in situation where yield was low and high application of cropresidues or organic matter, or high soil supply of K. IAARD in collaboration with IRRI had developed theNutrient Manager for Rice, an interactive computer-based decision tool, which provides fertilizer guidelinefor a rice field, based on the response to Âeasy-to-answer multiple choice questionsÂ. The web application ofNutrient Manager for Rice for Indonesia was released by Minister of Agriculture and could be accessedthrough http://webapps.irri.org/nm/id. It became evident that extension workers could be reached fasterthrough internet to improve their knowledge for fertilizer management in Indonesia. The target users are (a)AIAT extensionist, (b) field extension, and (c) progress farmers. With SSNM technology, it is expected that theuse of fertilizer by farmers it more rational, and at the same time increase rice production as well as farmersÂincomes.]]>
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