Quantifying the response of rabi sorghum (Sorghum bicolor L.) to nano urea

A field experiment was carried out during the rabi season of the year 2023-24 at College Farm, N. M. College of Agriculture, NAU, Navsari, Gujarat for “Quantifying the response of rabi sorghum [Sorghum bicolor L.] to nano urea”. The experiment was laid out in Randomized Block Design having ten treatments comprising of T₁: Absolute control (0% N), T₂: 80% RDN + spray of nano urea @ 4.0 ml/l at 30 DAS, T₃: 80% RDN + spray of nano urea @ 4.0 ml/l at 30 and 45 DAS, T₄: 60% RDN + spray of nano urea @ 4.0 ml/l each at 30 DAS, T₅: 60% RDN + spray of nano urea @ 4.0 ml/l each at 30 and 45 DAS, T₆: 80% RDN + spray of urea (2%) at 30 DAS, T₇: 80% RDN + spray of urea (2%) at 30 and 45 DAS, T₈: 60% RDN + spray of urea (2%) at 30 DAS, T₉: 60% RDN + spray of urea (2%) at 30 and 45 DAS and T₁₀: 100% RDN through Urea with three replications. Among the different treatments, application of 80% RDN + spray of nano urea @ 4.0 ml/l at 30 and 45 DAS (T₃) recorded a significantly higher plant height, panicle length, number of grains per panicle, grain yield and straw yield but it was statistically at par with treatment T₁₀ (100% RDN through Urea) except plant height at 30 DAS. Whereas, significantly lower higher plant height, panicle length, number of grains per panicle, grain yield and straw yield was recorded under treatment T₁ (Absolute control (0% N)). The maximum net return of 91009 ₹/ha was obtained under the treatment of 80% RDN + spray of nano urea @ 4.0 ml/l at 30 and 45 DAS (T₃) followed by treatment T₁₀ (100% RDN through Urea). Maximum BCR of 2.34 was obtained under the treatment of 100% RDN through Urea (T₁₀) followed by treatment T₃(80% RDN + spray of nano urea @ 4.0 ml/l at 30 and 45 DAS).