Optimizing corn production in Georgia necessitates precise management of nitrogen (N) fertilizer rates, irrigation practices, and seeding densities to enhance yields and minimize environmental impacts. This study evaluated three N recommendation methods—Crop Yield Goal (CYG), Agronomic Optimum N Rate (AONR), and Economic Optimum N Rate (EONR). Results indicated that CYG often overestimated optimal rates, underscoring the importance of site-specific adjustments. Irrigation scheduling methods, including the checkbook system, half-checkbook system, and Smart Irrigation CropFit app, were assessed for their effects on yield and N use efficiency, revealing that precise irrigation enhances nitrogen utilization. Additionally, field trials investigated the influence of seeding density on yield and growth, highlighting its role in maximizing efficiency. Collectively, these findings support tailored management practices that integrate N, water, and planting strategies. This research provides actionable insights to improve corn productivity and sustainability under Georgia’s diverse environmental and agronomic conditions.