Farm Mechanization in rice aims to not only to reduce labour, inputs, human drudgery but also at improving farm productivity. Due to shortage of labour, scarcity of water and energy, the weed competition is going to be the major constraint in achieving higher production in transplanted rice. In order to standardize the selective mechanization for enhancing productivity and profitability of rice, two field experiments were conducted during Kharif 2012 and 2013 at Perunthalaivar Kamaraj Krishi Vigyen Kendra (PKKVK). | Standardize the selective mechanization for enhancing productivity and profitability of rice