Conclusion SENSITIVITY ANALYSIS AND OPTIMIZATION OF THE PRODUCTION MODEL OF ORGANIC RICE FARMING IN

54 Table 5.6. Result of profit and RC calculation for milled rice sale No. Production Milled Rice ton Cost Rp Revenue Rp Profit Rp RC 1 7.00 21,357,833 29,137,500 7,779,667 1.36 2 8.00 22,224,966 33,300,002 11,075,036 1.50 3 9.00 23,092,407 37,462,501 14,370,094 1.62 4 10.00 23,960,125 41,625,001 17,664,876 1.74

5.4. Conclusion

The productivity model developed could nicely predict the production of organic rice using SRI method in the District of Sukabumi. The parameters used in the model were local specific which could not be used in other areas. However, the model could further be developed for other areas by considering or using data from the other local area. Based on the tests conducted for sensitivity analysis, the model was sensitive enough to changes in the value of the parameters of the model. The result of the tests also indicated that there was no change in the structure of the model. Concerning the profitability of organic rice farming with SRI, selling milled rice is more profitable rather than selling it directly after harvest as harvest-dry rough rice. However, the values of RC Ratio of harvest-dry rice sale are somewhat higher than those of milled rice sale.

VI. THE DEVELOPMENT OF SUSTAINABLE ORGANIC RICE FARMING USING SRI IN THE DSTRICT OF SUKABUMI

6.1. Background

The successfulness of rice farming using SRI method is very dependable upon how the concept is applied in the field. This rice cultivation method seems to offer better future for the elevation of rice production. However, the sustainability of this method is still questionable if applied in larger scale of rice farming Gardjito et al. 2006. The adoption of SRI method can cause some changes in socio-economic, technical and environmental aspects of rice production. Concerning the change in attitude, it is not easy for farmers to be convinced that a new method can increase rice production immensely. Therefore, more indebt study in various aspects of this method is still required. Beside some topics of research focusing on soil and agronomic aspects, other research in macro aspect concerning rice production using this method with modeling approach is also important Gardjito et al. 2010. Experience of a farmer in Desa Cibadak, District of Sukabumi, who had received training about SRI, indicated that by applying this method he managed to achieve rice production ranging from 6.5 to 8.5 tonha. In other areas on Java Island and several other Asian countries, the yields resulted from field experiments were even higher Gardjito et al. 2006. As a comparison, a field survey and on-farm experiments were conducted in the central highland of Madagascar to assess rice yield performance and key management practices on a few of the early SRI-practicing smallholder farmers. The result indicated that rice grain yields at the survey fields were 9.9 tonha maximum without using mineral fertilizer Tsujimoto et al. 2009. In several other smallholder farms in that area, even higher yields over 15 tonha were reported Rafaralahy 2002, in Tsujimoto et al. 2009. Due to its high productivity based on several existing records and reports, organic rice cultivation with SRI method is necessary to consider about its development in conjunction with the proliferation of rice production either at local or national level. The development should be sustainable which can be viewed