Vol. 6, Issue 2, Part A (2024)

This study evaluates the yield response of major cereal crops—wheat, barley, and maize—to varying plant nutrition levels under variable climatic conditions in selected regions of Iran. Using both field trials and process-based crop simulation modeling, we analyze how nitrogen, phosphorus, and potassium fertilization strategies interact with climatic variables such as temperature and precipitation. Results highlight significant interaction effects, indicating that optimal nutrient management must be adaptive to regional climatic variability for maximum yield. The findings provide valuable insights for agronomic planning in semi-arid climates.