Different maize hybrids vary in nutrient uptake efficiency. Plant density influences nutrient absorption, which affects yield at different growth stages such as germination, tasselling, and kernel development. Few studies have examined the relationship between soil electrical conductivity (EC) and maize yield under varying plant densities. This research aimed to identify optimal hybrid–density combinations for improved productivity and resource use efficiency. The experiment was conducted in 2024 at the Látókép Experimental Station (Debrecen, Hungary) under strip tillage on non-irrigated chernozem soil. Three maize hybrids (Merida, Fidencio, and P9985) were cultivated at two plant densities (60,000 and 80,000 plants ha^-1) with a fertiliser rate of 80 kg Nitrogen ha^-1 plus basal Phosphorus and Potassium. Soil EC was measured monthly with a portable sensor from planting to cob formation, and grain yield was determined at harvest. Data were aggregated by hybrid–plant density and statistically analysed using SPSS Software (IBM v20), with significance evaluation at p ≤ 0.05. Results revealed no significant correlations among hybrid, EC, plant density, and yield. This shows that neither EC nor plant density reliably predicts yield, suggesting other factors, such as soil moisture and fertility, that may exert stronger influence. Future studies should examine interactions between EC and other factors affecting maize productivity. Moreover, long-term studies across multiple seasons and diverse soil types could clarify EC patterns under varying environmental conditions, tillage systems, and irrigation regimes.