Vol. 11, Issue 12 (2022)

A field experiment was conducted to study the Influence of nano urea on growth and yield of jamun cv. AJG-85 under HDP system during the year 2021-22 at Department of Fruit Science, Kittur Rani Channamma College of Horticulture, Arabhavi, University of Horticultural Sciences, Bagalkot. The study revealed that treatment T₈ was shown to be the best, with the maximum incremental plant height of 0.42 m, incremental stem girth (0.48 cm), incremental plant spread [(E-W) and (N-S) of jamun i.e., 0.80 m and 0.53 m respectively] and incremental canopy volume (8.70 m³) was recorded 9 months after foliar (MAF) spray. However, minimum incremental plant height was recorded under T₆ (0.16 m), incremental stem girth in T₄ (0.18 cm), incremental East-West canopy spread in T₅ (0.23 m), incremental North-South canopy spread in T₁ (0.26 m) and incremental canopy volume noticed under T₃ (3.53 m³) treatment at 9 MAF spray. The maximum yield in kg per plant (4.93) and yield in tonnes per hectare (5.48) was noticed in plants applied with foliar spary of T₂ (100 per cent RDN through nano urea at 0.4 per cent) which was found at par with T₅ (50% RDN through urea + 0.4% nano urea) treatment. Overall concluded that application of 50 per cent RDN through urea + 0.4 per cent nano urea foliar spray was as good as 100 per cent RDN through nano urea, thereby saving 50 per cent RDN through urea.