Vol. 11, Special Issue 11 (2022)

The experiment was conducted with four levels of nutrient spray of NPK (19:19:19)@, 0gm, 10gm, 20 gm, 30 gm/litre and four mulching treatments viz. no mulch, black mulch, yellow mulch and transparent mulch. The vegetative, floral and seed characters showed an increasing trend with increase in the dosage of nutrient sprays up to 20 g/litre NPK (19:19:19) thereafter it remained more or less uniform at 30 g/litre NPK (19:19:19) and both treatments were statistically at par with each other for most of the characters. So nutrient spray of NPK (19:19:19) @ 20 g/litre was found to be best for enhancing the growth, flower and seed parameters of calendula. Among different polythene mulches, black coloured polythene mulch followed by yellow coloured mulch was found to be best in recording improved vegetative, flower and seed production characters of calendula. The dry mass of weed was found to be greater in the plots having no mulch followed by the plots covered with transparent polythene mulch. Zero percent of weed infestation was reported in plots covered with black and yellow coloured mulches. Among interactions Fertigation with water soluble fertilizers @30 g/lit and black mulching recorded highest values for growth, flowering and yield parameters.