OPTIMUM ROW RATIO FOR SEED PRODUCTION OF SINGLE CROSS MAIZE HYBRID, KARIMNAGAR MAKKA-1 FOR ENHANCED YIELD AND PROFITABILITYG. Manjulatha, E. Rajanikanth and D. SravaniAbstract This study undertaken during rabi season of 2017 and 2018 at Agricultural Research Station, Karimnagar, Telangana to study the effect of planting row ratios of female: male for seed production of Maize hybrid Karimnagar makka-1. The flowering showed that male inbred has taken 60 days after sowing (DAS) to 50% pollen shedding as against 64 days in both 4:1 and 5:1 row ratios and female showed 50% silking at 63 DAS compared to 66 days in both 4:1 and 5:1 row ratios. The 5:1 row ratio recorded significantly more cob length (18.3 cm). Kernel number (29.5), 100-seed weight (39.3g), grain weight per cob (107.6g), seed yield of (2597 Kg/ha) and net returns (Rs. 3,93,632/ha) compared to 4:1 row ratio (17.9 cm, 27.3, 36.6 g, 99 g, 2094 Kg/ha and Rs. 3,05,132 / ha respectively) indicating 19.3 and 22.5% increased yield and net returns over 4:1 row ratio which in turn resulted significantly higher yield over 3:1 row ratio |