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Maximising potato nitrogen use efficiency (NUE) is necessary to combine high yields, market requirements, high economic income and low environmental impact. A 5-year study was conducted to assess the cultivar effect on NUE components in France. Seven trials were carried out in the Beauce, Picardie and Nord-Pas de Calais regions. The protocol combined two factors: cultivar (‘Agata’, ‘Bintje’, ‘Innovator’,...