BACKGROUND: Management of balanced fertilizer application according to plant growth requirements and soil testing is one of the strategies for improving the quality and quantity of agricultural products. OBJECTIVES: This study was conducted to assessment effect of different levels of Potassium Sulfate and Boron foliar application on seed yield and morphological traits of Corn under warm and dry climate condition. METHODS: This research was done via split plot experiment based on randomized complete blocks design (RCBD) with three replications along 2023 year. The main plot included Potassium sulfate (Control, 5 kg.ha-1, 10 kg.ha-1, 15 kg.ha-1) and Boron foliar application (Control, 1 L.ha-1, 2 L.ha-1) belonged to sub plots. RESULT: Result of analysis of variance revealed effect of different level of Potassium sulfate and Boron foliar application on all studied traits was significant (instead Ear diameter) but interaction effect of treatments was not significant (instead seed yield and biologic yield). Mean comparison result of different level of Potassium sulfate indicated that maximum amount of biologic yield (1630.10 g.m-2), seed yield (6414.01 kg.ha-1), leaf area index (4.19), plant height (202.11 cm), Ear length (19.06 cm) and Ear diameter (4.43 cm) belonged to 15 kg.ha-1 Potassium sulfate treatment and lowest amount of mentioned traits was for control. As for Duncan classification made with respect to different level of Boron foliar application the highest and lowest amount of studied traits (instead Ear length loss) belonged to 2 L.ha-1 and control treatment. Assessment mean comparison result indicated in different level of Potassium sulfate the maximum Ear length loss (1.95 cm) was noted for control and minimum of that (1.68 cm) belonged to 15 kg.ha-1 Potassium sulfate. Compare different level of Boron foliar application showed that the maximum and the minimum Ear length loss belonged to control (2.13 cm) and 2 L.ha-1 (1.61 cm) treatments. CONCLUSION: Generally result of studied research revealed use of 15 kg.ha-1 Potassium sulfate and 2 L.ha-1 Boron foliar application had the highest amount of studied characteristics and it can be advice to produces in studied region. تفاصيل المقالة