Different application methods of nutrients were introduced to strengthen the judicial use of fertilizers. Zinc and boron are two vital micronutrients for cultivation, especially onion. Therefore, this study was designed to find the most suitable application methods of zinc and boron on growth and yield of onion. The single factor experiment was laid out following a randomized complete block design with three replications. The treatments were control (T0), soil application of zinc (T1), soil application of boron (T2), foliar application of zinc (T3), foliar application of boron (T4), soil application of zinc and boron (T5), soil application of zinc and foliar application of boron (T6), foliar application of zinc and boron (T7), soil application of boron and foliar application of zinc (T8). The source of zinc and boron for the soil application were zinc sulfate and borax, respectively. And, the foliar applications were done with the solution of 1% chelated zinc and solubor, respectively. The foliar applications were applied from 40 days after transplanting three times with an interval of 15 days. The results of the experiment showed a significant effect of application methods of zinc and boron on growth and yield contributing characters of onion. The investigation revealed that soil application of zinc is more effective over that of foliar application, whereas foliar application is more effective in the case of boron.














