System of Rice Intensification (SRI) with weed management is an imperative to convince the today’s crop production in a sustainable way. Due to scarcity of water and energy, the weed competition is going to be the major constraint in achieving higher production in transplanted rice. System of Rice Intensification (SRI) is a six components like young seedlings transplanted at wider spacing using, use of organics, conoweeding and saturation moisture package aimed at realizing higher rice production using less inputs especially, seed, water and fertilizers. Since entire package may not possible to adopt in all cases, In order to Evaluation of principles of SRI and their contribution towards enhancement of grain yield, two field experiments were conducted during Rabi 2012-13 and Kharif 2013 at Perunthalaivar Kamaraj Krishi Vigyen Kendra (PKKVK), Puducherry State experimental farm in a randomized block design with three replication. The treatments were T1-SRI (use of 8-12 day old seedlings, raised bed nursery, careful transplanting at a spacing of 25 cm x 25 cm, weed management with cono weeder (4 times), Saturation of water management, and use of (75%) inorganic along with (25%) Organic, T2- T1 with 3-4 seedlings per hill (instead of 1 seedling per hill), T3- T1 with 30 to 35 day old seedlings (instead of 8-12 day old seedlings), T4- T1 with 20 x 10 cm spacing (instead of 25 x 25 cm spacing), T5- T1 with only inorganic (RDF) (instead of organic + inorganic), T6- T1 with herbicide + manual weeding (instead of cono-weeding), T7- T1 with alternate wetting and drying (instead of situation of water management) and T8-Conventional transplanting management practices that were tested on System of Rice Intensification crop. The findings of two seasons, use of 8-12 days young seedlings with four times conoweeding at spacing of 25cm x 25cm, saturation of water management and use of (75%) inorganic along with (25%) Organic with 3-4 seedlings per hill (T2) was performed excellent by registering higher yield attributes and grain yield of 8080 and 8500 kg ha-1 during Kharif 2012 and Rabi 2012-13 respectively, besides it also gave higher net return by reducing the cost production particularly in edging out higher inorganic fertilizers, wider spacing and conoweeding without affecting the grain yield in rice was proved by the study.

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