At present, site specific nutrient management (SSNM) for rice crop is developed and adopted by the farmer all over the world. Site specific nutrient management is applying those concepts to areas within a field that are known to require different management from the field average. Site specific management includes practices that have been previously associated with maximum economic yield management, best management practices (BMPs) as well as general agronomic principles. SSNM aims at dynamic field-specific management of N, P, and K fertilizer to optimize the balance between supply and demand of nutrients. The plants need for N, P, or K fertilizer are determined from the gap between the supply of a nutrient from indigenous sources, as measured with a nutrient omission plot, and the demand of the rice crop for that nutrient, as estimated from the total nutrient required by the crop to achieve a yield target for average climatic conditions. Certain tools and approaches were developed to consolidate the complex and knowledge intensive SSNM information into simple delivery systems enabling farmers and their advisors rapidly implement this technology to ensure cost-effective site specific guidelines for fertilizer recommendations. The systematic implementation of these practices in to site specific system is probably our best opportunity to develop a truly sustainable agriculture system.