Groundnut (Arachis hypogaea L.) is cultivated in diverse agro-climatic environments characterized by spatial and temporal variation in rainfall, temperature and soils of varying water holding capacity under rainfed as well as irrigated conditions. The productivity of early Kharif groundnut is very low due to lack of suitable variety and optimum plant population coupled with heavy weed infestation as the crop is grown under irrigation. Groundnut crop is highly sensitive to weed competition and yield reduction up to 70% have been observed (Americanos 1994). Varieties differ not only in their production potential, but also differ in competitive ability of weeds on account of variation in rapid development of foliage and formation of close canopy during early growth stage (Bussan et al. 1997). Different crop geometry also imparts competing ability of crop plants to weeds (Singh and Bhan 2002). It was concluded that groundnut ‘Kadin-6’ had the highest weed suppressing ability, whereas the highest pod yield was recorded with variety Dharani’. A plant population of 0.66 m/ha was optimum for weed suppression.