Impact of Variable Fertilization on Forage Corn Productivity

This article presents the results of a comparative study of impact of variable fertilization on forage corn productivity in 2022 and 2025 in the production conditions in Western Siberia. The relevance of this study conditioned by the need for rational fertilizer use in the face of rising fertilizer costs and climate variability. The aim of research was to comparatively evaluate the effectiveness of traditional uniform and variable (precision) fertilizer application methods based on agrochemical field mapping. Three field experiment options compared: control (no fertilizer), traditional application of organic and mineral fertilizers and variable fertilization with dose adjustment based on spatial heterogeneity of soil fertility. It was found that the differentiated system provided the maximum relative yield increase (+36%) in the drought-prone of 2025, demonstrating high adaptability to stressful weather conditions. Furthermore, this technology significantly reduced within-field yield variability (coefficient of variation 1.83% versus 10.90% in the control), ensuring a more uniform agricultural background. The results confirm that differentiated fertilization is a resource-saving and environmentally friendly element of precision farming, contributing to the stabilization of forage crop production in a variable climate and cost optimization.