Calibration books vegetables

How to draw a good variety description? How to fill out the Technical Questionnaire as accurately as possible?


Variety testing (DUS) and describing varieties are based on CPVO Technical Protocols and UPOV Test Guidelines.

For the major crops for listing and/or Plant Breeders’ Rights, Naktuinbouw has developed calibration books. The calibration book serves as a very practical manual that gives an illustrated explanation of each crop characteristic mentioned in these guidelines/protocols.


Calibration books are available for several crops. You can find the list of crops on the Dutch part of our website.