Assessment of foliar application of nano urea on growth and yield attributes of linseed (Linum usitatissium L.)

A field experiment was conducted during Rabi 2024 at the Experimental Farm of Oilseeds Research Station, Latur to study the influence of foliar application of Nano Urea on growth and yield of linseed (Linum usitatissimum L.). The experiment was laid out in a Randomized Block Design comprising eight treatments viz., T1-Control, T2-100% NPK, T3-100% NPK + 1 F.A. of Nano Urea @0.4% at 40 DAS, T4-75% RDN + 100% PK + 2 F.A. of Nano Urea @0.4% at 20 and 40 DAS, T5-75% RDN + 100% PK + 2 F.A. of Nano Urea @0.5% at 20 and 40 DAS, T6-50% RDN + 100% PK + 2 F.A. of Nano Urea @0.4% at 20 and 40 DAS, T7-50% RDN + 100% PK + 2 F.A. of Nano Urea @0.5% at 20 and 40 DAS and T8-100% PK + 3 F.A. of Nano Urea @0.5% at 15, 30 and 45 DAS, each replicated thrice. The results showed that the key growth attributes such as plant height (13.55 cm, 34.17 cm and 37.23 cm at 25, 50 DAS and at harvest), fresh weight (8.76 g at 25 DAS and 42.28 g at 50 DAS) and Dry weight (2.21 g at 25 DAS and 10.55 g at 50 DAS) plant-1, improved with the application of 100% NPK + 1 F.A. of Nano Urea @0.4% at 40 DAS which was found at par with treatment T4 (75% RDN + 100% PK + two foliar applications of Nano Urea @0.4% at 20 and 40 DAS), T2 (100% NPK) and T5 (75% RDN + 100% PK + two foliar applications of Nano Urea @0.5% at 20 and 40 DAS). In terms of productivity, significantly higher number of capsules plant-1 (34.93), number of seeds capsule-1 (9.18), seed yield (1090.53 kg ha-1) and straw yield (2029.31 kg ha-1) were observed with treatment 75% RDN + 100% PK + two foliar applications of Nano Urea @ 0.4% at 20 and 40 DAS. This performance was found statistically at par with T3 (100% NPK + one foliar application of Nano Urea @0.4% at 40 DAS), T2 (100% NPK) and T5 (75% RDN + 100% PK + two foliar applications of Nano Urea @0.5% at 20 and 40 DAS).