2026. Synergistic effects of nano urea and PSB on oil quality, production and crop productivity of Monarda citriodora in Jammu region: Synergistic effects of nano urea and psb on Monarda citriodora. Indian Journal of Experimental Biology (IJEB). 64, 06 (Jun. 2026), 572–578. DOI:https://doi.org/10.56042/ijeb.v64i06.27965.