Effectiveness of Site Specific Nutrient Management (SSNM) Application for Rice on Irrigated Land at Southeast Sulawesi. Fertilizing technology is a component technology to increase the rice production, otherwise the existing recommendation for fertilizing is not locally specific. Site Specific Nutrient Management (SSNM) is a software technology to obtain the site specific fertilizing recommendation. The research was applied to analyze the performance of plant growth, production, and economic aspect on irrigated rice area in South East Sulawesi. The research was conducted using action research by comparing SSNM with farmer existing technology for two seasons including wet season (October 2011 – January 2012) for 4 ha area collaborated with 40 farmers and dry season (Juli – November 2012) for 21,4 ha and collaborated with 25 farmers at Uepai Sub District in Konawe District. The result showed that tillering quantity and rice yield of those using SSNM recommendation were significantly higher and the number of empty grains was significantly lower than farmer's practice as well. The rice productivity using SSNM recommendation was higher 20 – 34% than farmer's practice. SSNM software was compatible to use in setting doses of N, P and K recommendation with rate of production target reached 87,5% for season I and 89,5% for season II. The application of SSNM technology contributed to increase income by IDR3.912.200 in wet season and IDR2.838.700 in dry season. MBCR value were 5,12 in wet season and 5,70 in dry season those showed SSNM technology was feasible to be applied.