Vol. 11, Issue 11 (2022)

Present investigation was laid out in Factorial Randomized Block Design (FRBD) with three different levels of RDF; F₁: RDF 80% (80:40:40 NPK kg/ha), F₂: RDF 100% (100:50:50 NPK kg/ha) and F₃: RDF120% (120:60:60 NPK kg/ha) with six levels of organic sources viz., S0: Control, S₁: Biomix 10 kg/ha, S₂: Biomix 12.5 kg/ha, S₃: Biomix 15 kg/ha, S₄: Humic acid 05 kg/ha and S₅: Humic acid 10 kg/ha comprising eighteen treatments and replicated thrice. The higher values of bulb attributes viz., polar diameter of bulb (6.48 cm), equatorial diameter of bulb (8.29 cm), number of scales per bulb (8.76) and volume of bulb (73.21 cc) was recorded under F₃: RDF 120% (120:60:60 NPK kg/ha). In organic sources humic acid 10 kg/ha level recorded higher values of bulb attributes viz., polar diameter (6.06 cm), equatorial diameter of bulb (7.80 cm), number of scales per bulb (7.99) and volume of bulb (72.59 cc). In root studies, the onion produced under RDF 120% have recorded the higher values of the root parameters, viz., number of roots per bulb (146.49) and root length (20.63 cm). In organic sources the maximum number of roots per bulb (143.98) and root length (19.53 cm) was recorded under humic acid 10 kg/ha.