The competitive interactions of ten upland rice genotypes were assessed by growing binary mixtures and component monocultures for evaluating the agricultural value of variety mixture for higher productivity. Also attempt was made to correlate different characters with competitive ability and to use such information in selection strategies for developing upland varieties with high yields and competitive ability. The different parameters of de Wit’s model like relative yield, relative crowding coefficient and relative reproductive rate were used for assessing competitive interactions. It was found that competitiveness is associated with the increased grains per panicle, higher grain fertility and better grain filling. The genotypes Kalinga III, Badami and Khandagiri were found to possess high competitive ability. It was also noticed that the binary mixtures like Badami + Annada, Pathara + Badami, Badami + Annada, Ghanteswari + Sidhant, Suphala + Annapurna, Parijat + Badami out yielded the best component parent.