Maturity

• the British Potato Varieties Database
• varieties in the Netherlands NIVAP
• French catalogue , criteria, select: Précocité de maturation (also available: Précocité de tubérisation)

Nitrogen uptake efficiency

• GRIN: data for  63 acc. (some overlap).

Yield potential

• the  British Potato Varieties Database
• varieties in the Netherlands  NIVAP
• French catalogue , criteria, select: Indice de rendement
• CIP  advanced clones