EFFECT OF FOLIAR SPRAY OF MICRO-NUTRIENT ON GROWTH AND YIELD OF KNOL-KHOL (BRASSICA OLERACEAE L. VAR GONGLYODIES)

The Present investigation entitled "Effect of foliar spray of micronutrients on growth, yield and quality parameters of Knol khol (Brassica oleraceae L. var gonglyodies)" was carried out during Rabi season 2022-2023 at the Vegetable Research Farm, Department of Horticulture, Institute of Agricultural & Natural Sciences, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur.The Experimental materials of present investigation were comprised of one genotype of knol khol (var.White Vienna) with three micronutrients with their combinations and control, the three micro-nutrients taken namely Boric acid (H 3 BO 3 ) 0.25%, 0.50%, Copper sulphate (CuSO 4 ) 0.25%, 0.50% and zinc sulphate (ZnSO 4 ) 0.25%, 0.50%, each of the micronutrients was sprayed at three different concentrations.Experiment was carried out with a completely randomised block design with 7 treatments and three replications.The following observations were recorded Growth parameters of knol khol viz., plant height (cm), number of leaves per plant, leaf width (cm), were recorded at 30 days and at harvest stage.All the treatments exhibited superior growth and yield of knol khol.Treatment T 4 (boric acid @ 0.25%) was found highly effective for growth and yield parameters as it showed the highest average weight of the knob (214.35g).The Treatment T 3 (zinc Sulphate @ 0.50%) was found effective for yield attributing as it showed the highest knob length (7.65 cm), knob diameter (6.74 cm), leaves width at 30 days (10.66 cm) and at harvest (28.24 cm) and leaf length at 30 days (10.35 cm) and at harvest (28.50 cm).Treatment T 5 (boric acid @ 0.50 %) was found highly effective for growth and yield parameters as it showed greatest plant height (33.37 cm) at 30 days and (47.59 cm) at harvest days, number of leaves (12.10) at 30 days and at harvest (25.28).