The investigation was executed with nine treatments viz. nano forms of ferrous sulfide (7, 14, 21, 28 ppm) and macro sulphate (0.2, 0.4, 0.6, 0.8 per cent) along control, were applied as foliar sprays after 30 days transplanting on two varieties calendula namely Fiesta Gitana Mix’ ‘Fiesta Yellow’ during 2018 2019. experiment laid out in factorial randomized block design three replications. Appl...