http://repository.ipb.ac.id/handle/123456789/29131 Fri, 24 Apr 2026 15:17:15 GMT 2026-04-24T15:17:15Z http://repository.ipb.ac.id/handle/123456789/43778 The System of Rice Intensification (SRI) as a System of Agricultural Innovation Uphoff, Norman The System of Rice Intensification (SRI). developed in Madagascar some 25 years ago. is gaining increasing credence and momentum as probably 500.000 farmers in more than 20 countries are now using its methods to raise their rice. production -- while also reducing their use of external inputs and production costs. Rather than focus on the innovation itself, this paper will introduce SRI only briefly, focusing instead on the transnational system for innovation that has emerged in response to this agronomic opportunity that can be particularly beneficial for resource-limited households. Within SRI's conceptual and practical framework. farmers have devised many innovations. These are the focus of a parallel paper written for this workshop. That paper considers how farmers have made the original SRI methodology less labor-intensive (even labor-saving). and how they have extended methods devised for irrigated rice production both to unirrigated (rainfed) areas for growing rice and to other crops beyond rice. This paper is concerned with what can be considered as a de facto 'system of innovation' that surrounds and has accelerated the spread of SRI worldwide. SRI has differed from most other agricultural innovations in the extent to which farmers have voluntarily invested their own time and resources in taking SRI to peers as an impressive example of farmer-to-farmer extension. Also. innovative alliances have formed among diverse persons and organizations to disseminate and adjust the methodology. thereby supporting the spread of this innovation even despite resistance from some established institutions. Tue, 01 Jan 2008 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/43778 2008-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/43777 The Effects of Organic Matter and N, P, K Fertilizer on Nutrient Uptake and Yield of Corn in Inceptisol Ternate Rachman, Idris Abd.; Djuniwati, Sri; Idris, Komarudin The objective oj the research was to study the effects oj organic matter and N, P, K Jertilizer on nutrients uptake and yield oj corn in Inceptisol Ternate. The design oj the research was Jactorial completely randomized block design with two Jactors. The first Jactor was the rate oj organic matter (0, 20, 40 tlha) or (B(), B, and B z) and the second Jactor was the rate oj N, P, KJertilizer (0.5; I and /.5 recommended rate) or (Flo F] and F JJ. The results oj research showed that combination oj B ,F] gave the highest amount oj the corn leave at 42 days after planting, the weight oj corn with husk cover, the weight corn grains, and K-availability oj soil. Whereas, the rate oj 20 tlha organic matter (B,) significantly increased and gave the highest weight oj corn without husk cover, NPK corn plant content and P uptake. The average NPK plant uptake oJcorn was 31.41-39.39 kg Nlha, 6.03-/2.54 kg Plha, 37.5-41.70 kg Klha. The average production oj corn was 5. /6-7.83 tlha. Tue, 01 Jan 2008 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/43777 2008-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/43775 Application of Fuzzy Sets Function for Land Attributes Mapping Baskoro, Dwi Putro Tejo A study was conducted to evaluate the potential use of Geographical Information System (GIS) for mapping the biophysical resources of watershed PC-based GIS soft-wares were used in the analysis, processing and mapping of spatial data. The conventional mapping technique that presents land attribute in form of polygon with abrupt change across class boundaries was improved using Fuzzy technique. This technique involves the generation of membership maps for each soil type based on the relationship between the soil type and it's forming factors like geology, elevation, slope gradient, slope aspect, slope curvature, and land cover. The fuzzy technique was found to be more appropriate than the conventional technique of mapping in expressing continuous and gradually changing soil or land attributes. Validation with observed soil or land attributes values indicated that root mean square error (RMSE) obtained for Fuzzy method was lower than that from the conventional method. Tue, 01 Jan 2008 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/43775 2008-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/43773 The Effect of Calcium Silicate on The Phosphorus Sorption Characteristics of Andisols Lembang West Java Hartono, Arief The effect of calcium silicate CaSiOJ the phosphorus (P) sorption characteristics were studied in Andisols Lembang. The amount of 0, 2.5 and 5% CaSiOJ (calcium silicate) or 0, 7.5 and 15 g calcium silicate per pot was added to the 300 g (oven-dry weight) soil and incubated for one month. A completely randomized design in double replication was set up. After one month incubation, P sorption and P sorption kinetic experiments were conducted The results of P sorption experiment showed that P sorption data were satisfactorily described by the Langmuir equation. which was used to determine P sorption maxima, bonding energies and P sorbed at 0.2 mg P £"' (standard P requirement). The application of calcium silicate did not affect significantly P sorption maxima but decreased significantly the P bonding energies. Calcium silicate also decreased significantly the standard P requirements. As for P sorption kinetic experiment. the results showed that application of 5% calcium silicate decreased significantly the rate constant of P sorption and P sorbed maximum at given amount of added P. The results suggested that the application of calcium silicate to the Andisols made added P was more available for plant. Tue, 01 Jan 2008 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/43773 2008-01-01T00:00:00Z