A field study was conducted at Tamil Nadu Agricultural University, Coimbatore in wetland during samba season 2014-15 with an objective to study the effect of seedling age on yield components and economics in rice landraces under irrigated rice ecosystem. The experiment was laid out in Split Plot Design with three replications. The treatments in main plot were three age of seedlings viz., 15, 20 and 25 days old seedlings and in sub plot eight rice landraces viz., Chandikar, Kuliyadichan, Kuruvaikalanjiyam, Norungan, Nootripathu, Black Kavuni, Red Kavuni, Njavara and CO(R) 50 (one high yielding variety). Observations were recorded on yield attributes like total spikelet, filled grains, unfilled grains, spikelet sterility percentage, thousand grain weight, grain yield and straw yield were recorded at the time of harvest. The plant nutrient uptake and nutrient status in soil was also estimated. The study concludes that 15 days old seedling in all the eight rice landraces and one high yielding variety, recorded yield attributes, economics and N, P and K uptake. In rice landraces, Red Kavuni recorded enhanced higher yield attributes, economics compared to other rice landraces.