The aims of this study were optimize space for rubber row, study the response of paddy varieties to the environmental conditions of rubber row, and study for effect of paddy polyculture on 16 years old rubber plants. The research was carried out at the rubber research plantation (3°13'56.4S 104°38'13.3 E), Faculty of Agriculture, Sriwijaya University, Indralaya, Ogan Ilir Regency, South Sumat…