Real-time control for multi-parametric data fusion and dynamic offset optimization in sensor-based variable rate nitrogen application

•Fusion of crop N and soil ECa information based on a fuzzy expert system.•Generic approach for dynamic offset optimization within a sensor-spreader system.•Distinction of two subsections within the data fusion and application system.•Real-time control implementation and system evaluation under dynamic conditions.•Offset optimization deviations never beyond 1.5 m and max. 2.3% beyond 1 m.