Vol. 8, Issue 8, Part D (2024)

Abstract: The experiment was carried out in Split Plot Design with 16 treatment combinations of fertility levels as main plot viz., N₁- Control, N₂- 50% RDF, N₃- 75% RDF and N₄- 100% RDF with foliar application of nano urea treatment as sub plot viz., S₁- Nano urea spray one time (20-25 DAT @ 5 ml L^-1 water), S₂- Nano urea spray two times (20-25 DAT & 40-45 DAT @ 5 ml L^-1 water), S₃- Urea spray one time ( 20-25 DAT @ 20 g L^-1 water) and S₄- Urea spray two times (20-25 DAT & 40-45 DAT @ 20 g L^-1 water) were replicated thrice at DKS College of Agriculture and Research Station, Bhatapara, Chhattisgarh. The results of this experiment reveals that grain and straw yield (kg ha^-1) of rice were found significantly superior under treatment N₄- 100% RDF followed by N₃- 75% RDF. Among the foliar application of nano urea, grain yield and straw yield were recorded significantly higher in treatment S₂- Nano urea spray two times (20-25 DAT & 40-45 DAT @ 5 ml L^-1 water) followed by S₄- Urea spray two times (20-25 DAT & 40-45 DAT @ 20 g L^-1 water). In case of fertility levels, the value of Gross return (₹ ha^-1), Net return (₹ ha^-1) and B:C ratio were recorded significantly highest under treatment N₄-100% RDF followed by treatment N₃- 75% RDF. Among the foliar application of nano urea treatments, value of Gross return (₹ ha^-1), Net return (₹ ha^-1) were recorded significantly higher under treatment S₂- Nano urea spray two times (20-25 DAT & 40-45 DAT @ 5 ml L^-1 water) and highest B:C ratio were recorded significantly highest under treatment S₄- Urea spray two times (20-25 DAT & 40-45 DAT @ 20 g L^-1 water). Whereas Lowest value of Gross return, Net return and B:C ratio were noticed in treatment N₁- control and S₃- Urea spray one time (20-25 DAT @ 20 g L^-1 water).