The researchers studied drought-resistant maize varieties to improve yield in dry regions. They tested different maize cultivars under water stress at different growth stages. They found that some cultivars had better drought resistance than others. One cultivar, Tieyan 120, had higher chlorophyll content and shorter stress periods. Tieyan 120 and Tieyan 58 showed strong drought resistance and higher yields. The study linked photosynthesis and yield to drought resistance. This research helps identify maize varieties that can thrive in dry conditions and produce better harvests.