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Variety Testing
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Plant Breeders’ Rights and/or listing DUS-VCU
- Breeder's co-trials vegetable crops
- External Crop Experts Ornamental Crops
- Conditions of submitting identity material for DUS testing
- Calibration books Variety Testing
- National protocols Variety Testing
- Procedure of landraces, hobby market and conservation varieties
- American Plant Breeders' Rights - technical testing
- Two tests in one year
- Identity (Variety Tracer)
- Varietal trueness and varietal purity
- Resistance
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Data of varieties
- Use of a third country synonym for a vegetable variety
- Vegetable-, agricultural- or ornamental crop?
- Authorisation: marketing material of not yet listed vegetable varieties
- Internal Naktuinbouw list for vegetable varieties
- List of names of Woody Plants and List of names of Perennials
- OrganicXseeds: database
- Variety descriptions
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Plant Breeders’ Rights and/or listing DUS-VCU
- Inspections
- Testing & Analyses
- Knowledge & Education
- About us
-
Variety Testing
-
Plant Breeders’ Rights and/or listing DUS-VCU
- Breeder's co-trials vegetable crops
- External Crop Experts Ornamental Crops
- Conditions of submitting identity material for DUS testing
- Calibration books Variety Testing
- National protocols Variety Testing
- Procedure of landraces, hobby market and conservation varieties
- American Plant Breeders' Rights - technical testing
- Two tests in one year
- Identity (Variety Tracer)
- Varietal trueness and varietal purity
- Resistance
-
Data of varieties
- Use of a third country synonym for a vegetable variety
- Vegetable-, agricultural- or ornamental crop?
- Authorisation: marketing material of not yet listed vegetable varieties
- Internal Naktuinbouw list for vegetable varieties
- List of names of Woody Plants and List of names of Perennials
- OrganicXseeds: database
- Variety descriptions
-
Plant Breeders’ Rights and/or listing DUS-VCU
- Inspections
- Testing & Analyses
- Knowledge & Education
- About us
Program NAL Proficiency tests 2025 available
Publicationdate: 15 januari 2025
NAL authorizes company laboratories to perform seed quality testing. One of the components of monitoring test quality is the proficiency test. The program for the NAL Proficiency tests in 2024 is now available. There are proficiency tests for seed analysis and for seed health.
Naktuinbouw Authorized Laboratories (NAL) is a system that authorizes company laboratories to perform seed quality testing. The system ensures that seed laboratories offers and maintains the required levels of reliability.
Quality testing of seed
NAL takes all the critical points of quality testing of seed into account: sampling prior to testing, the quality assurance system at the laboratory, the expertise of the analysts, the protocols and issuing the results via NAL quality certificates.
Monitoring test quality
To monitor the quality of the tests, participating laboratories must draw up a program for this. One of the components is that they participate in the (annual) ‘Proficiency test program’.
The 'Proficiency test program 2025' for NAL Laboratories is now available
You will find the program on the NAL page on our website under the heading Regulations – Proficiency tests. The 'NAL Conditions 2025' provide an explanation in Appendix VI about the organization of the proficiency tests in seed health.
Voluntary participation also possible
Experienced laboratories without NAL authorization can also participate (on a voluntary basis).
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