As part of the application process to add an agricultural crop to the National List, the plant must be tested to confirm whether the variety has satisfactory value for cultivation or use (VCU).
The growing trials for all crops, except potatoes, are organised by the British Society of Plant Breeders (BSPB). The trials for potatoes are organised by Science and Advice for Scottish Agriculture (SASA).
These trials are normally carried out for a minimum of 2 years, comparing the performance of candidate varieties with varieties already on the National Lists.
The trials use the VCU protocols and procedures approved by the Plant Variety and Seeds Committee, which represents the national authorities on seed issues to establish VCU.
Added VCU procedures for harvest 2020 for main crops (forage oats, grasses, potato, red clover and lucerne, and white clover) and minor crops (fodder kale, fodder radish, forage rape, forage rye, hemp and swede).
Added VCU procedure for harvest 2020: forage and grain maize
Added VCU procedures for harvest 2020: sugar beet and fodder beet.
Updated VCU procedures for cereal and winter oilseed
Updated VCU protocol for minor crops.
Added procedure for harvest 2019: forage and grain maize
Addition of Field Bean and Pea 2020 protocol
Addition of 2020 Harvest
Further procedures added for 2019 harvest
Sugar beet added to Procedures for 2019 harvest.
Addition of Trial Procedures for Official Examination of Value for Cultivation and use (VCU) Harvest 2019 Swede to 'minor crops' under 'procedures for 2019 harvest'.
Field beans protocol 2019 updated
Procedures for 2019 harvest - cereals, winter oilseed and linseed documents updated
Added procedures for harvest 2019 - Cereals (wheat, barley, oats, triticale, rye, spelt wheat)
VCU procedures for field beans 2019 harvest added
Procedures for 2019 harvest, Winter oilseed rape document updated
VCU procedure for linseed updated
Added procedures for harvest 2019 - spring oilseed rape, field peas, minor crop introduction, linseed, mustard, soya bean, spring lupin and sunflower
Added procedure for harvest 2018 - potato and harvest 2019 - winter oilseed rape. Removed harvest 2017 documents.
Potato protocol updated
Added harvest 2018 procedures - grasses and white clover
Added procedure for harvest 2018 - sugar beet
Added procedure for harvest 2018 - maise, red clover, fodder kale, forage rape and forage rye.
Added procedure for harvest 2018 - spring oilseed rape and winter oilseed rape
Updated harvest 2018 procedure - cereals and linseed
Added procedure for harvest 2018 - field beans
Updated harvest 2018 procedure - cereals
Updated harvest 2018 procedure - cereals
Added harvest 2018 procedures - cereals, field peas, minor crops, linseed, mustard, soya bean, spring lupin and sunflower
Updated VCU protocol sugar beet
Updated sugar beet 2017 harvest procedures
Harvest 2017 procedures - added potato and sugar beet, updated spring oilseed rape.
Removed harvest 2016 procedures.
Added harvest 2017 procedures - grasses, red clover and white clover
Added harvest 2017 procedures - forage and maize and fodder kale
Added harvest 2017 procedures - forage rape, forage rye and swede in minor crops
Updated field peas 2017 harvest procedures
Updated spring oilseed and linseed 2017 harvest procedures
Updated cereal and winterseed oil harvest 2017 documents
Updated field beans and field peas 2017 harvest procedures
Added spring oilseed rape procedure for 2017 harvest
Added cereals (wheat, barley, oats, triticale, rye, spelt wheat) procedure for 2017 harvest
Procedures for 2017 harvest published
Added grasses (perennial, Italian and hybrid ryegrass, Timothy and festulolium) and white clover procedures for 2016 harvest
Added procedures 2016 harvest - forage and grain maize, red clover and lucerne, fodder kale, forage rape, forage rye and swede
Procedures for potato for 2016 harvest published
Sugar beet harvest 2016 procedure added
Published cereals VCU procedures harvest 2016
Added field beans, field peas and spring lupin to procedures for 2016 harvest.
Procedures for oilseed rape for 2016 harvest published.
Published VCU procedure for red clover and lucerne for 2015 harvest
Published VCU procedure for cereals for 2015 harvest