Response of Sweet Corn (Zea mays L. Saccharata) to RDN Applied through Various Organics

N is one of the most important factors in crop productivity. A field trial with variety Sugar-75 was carried out during rabi season, 2018 at Organic farm, NAU, Navsari, Gujarat, India, consisting 8 treatments and 4 replications in RBD to investigate the growth and yield response of sweet corn to N. The growth parameters fluctuated significantly due to different treatments and T5 (100 % RDN by CC) recorded significantly higher plant height at 30 (22.1 cm) and 60 (136.0 cm) DAS, while, at harvest, T7 (50% RDN by BC + 50% RDN by CC) noted greater plant height (146.1 cm) and was at par with all organic treatments. The treatment T5 also recorded significantly high dry matter accumulation up to 45 DAS though, at final growth stages, T7 produced significant amount of dry matter (46.96, 98.18 and 144.87 g plant-1 at 60, 75 DAS and at harvest, respectively). At harvest, the yield parameters viz. number of cobs plant-1 (1.27), cob length (26.22 cm) and cob weight (238.2 g) along with fresh cobs (26.07 t ha-1), stover (8.0 t ha-1) and total biomass yield (11.7 t ha-1) also recorded considerably higher in T7 but, was statistically at par with CC integrated treatments (T6 and T8) in most cases. The increase in fresh cobs, stover and total biomass yields in T7 over T1 were 58.6, 70.2 and 58.1 %, respectively. The outcome, shows that N availability is the most limiting factor and require additional strategies to improve its efficacy under organic farming.