Response of NPK on Onion (Allium cepa L.) Yield

To increase onion productivity, an experiment was conducted at the experimental farm of the Department of Horticulture, GKU, Talwandi Sabo (Punjab) during the Rabi season of 2022-2023. The experiment was designed using a Randomized Block Design (RBD) with eighteen treatment combinations and three replications, with three levels of nitrogen (20, 40, and 60 N kg/ha), three levels of phosphorus (15, 20, and 30 P kg/ha), and two levels of potassium (20 and 30 K kg/ha). The observations were recorded plant height at harvest stage (cm), number of green leaves per plant at harvest stage, leaf length at harvest stage (cm), equatorial diameter (cm), polar diameter (cm), Bulb survival percentage (%), Marketable yield per plot (kg) and total yield per hectare (tons). The plant height 61.21 cm at harvest stage and number of leaves 17.56 at harvest stage, maximum leaf length at harvest stage 49.34 cm, equatorial diameter 8.34 cm, polar diameter 6.88 cm, bulb survival percentage 95.01%, marketable yield per plot 4.50kg and total yield per hectare 12.76 tons was recorded by T10 (40: 20: 30 Kg/ha) treatment. Therefore, application of 40: 20: 30 Kg/ha NPK gave the highest yield 12.76 tons and recommend for onion producer.