Research Journal of Agricultural Sciences Vol : 4 - Issue : 5 ; 581-585 Kavitha Mary Jackson, K Senthilraja, R Anbhazhagan, V Geethalakshmi and A Lakshmanan Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore - 641 003, Tamil Nadu, India Abstract The present investigation was undertaken to assess the interaction effect of system rice intensification (SRI) principles on the growth and yield components such as age of seedlings, number of seedling, spacing and weeding for higher seed yield and quality. SRI is the method, developed in Madagascar in the early 1980’s, where, it has been shown that yields can be enhanced by suitably modifying certain management practices such as controlled supply of water, planting of younger seedlings and providing wider spacing. SRI cultivation could save water, protect soil productivity, save the environment by methane gas produced from submerged paddy cultivation practices, brings down the input requirements besides increasing the yield. Four agronomic practices with two levels including age of seedling (Q1: 10 days old, Q2: 14 days old), number of seedling (R1: 1 seedling, R2: 3 seedling), spacing S1: 25 x 25 cm, S2: 30 x 20 cm and weeding: T1: 10th, 20th and 30th DAT, T2: 10th and 30th DAT with 2.5 cm irrigation were taken. The results revealed that the highest grain yield was observed in the treatment combination of 10 days old seedlings, one seedling per hill, 30 x 20 cm, conoweeding @ 10th, 20th and 30th DAT (Q1R1S2T1) which records 3752 Kg/ha followed by Q1R1S1T1 (10 days old seedlings, one seedling per hill, 25 x 25 cm spacing and conoweeding @ 10th, 20th and 30th DAT) which records 3678 kg ha-1.