A 'small strip' approach to empirically determining management class yield response functions and calculating the potential financial 'net wastage' associated with whole-field uniform-rate fertiliser application

► A 'small strip' experimental design is produced for field-scale response trials. ► The experimental design is used to determine site-specific optimal N and P rates. ► Median financial wastage from uniform management of N and P is calculated. ► Optimal application of N and P shows substantial potential financial benefits.