Rye: Grading

Important definitions

Net weight of sample
The sample after cleaning and removal of dockage is referred to as the cleaned sample. Its weight is the net weight of the sample. Percentages by weight for grading refer to percentages of the cleaned sample, or the net weight.
Hazardous substances in samples
Wear gloves and a mask to handle any samples that you suspect may contain hazardous substances. Hazardous substances are defined in the Regulations as “any pesticide, herbicide, dessicant or inoculant.”
Non-registered varieties
Where grain of any kind is not a registered variety under the Seeds Act, no person shall, except with the permission of the Canadian Grain Commission, assign a statutory grade to that grain which is higher than the lowest grade established by regulation for that kind of grain.

Representative portion for grading

All grading is done on representative portions divided down from the clean sample, using a Boerner-type divider.

The terms “Minimum” and “Maximum” refer to the range of sample portion size to be analyzed when an objective factor is present. The optimum representative portion (refer to Glossary) is determined by taking into consideration the tolerance and concentration of the objective factor being assessed.

Representative portion of rye for grading, grams
Grading factor Sample portion size range
Minimum Maximum
Broken 25 100
Ergot 500 working sample
Excreta working sample working sample
Fertilizer pellets working sample working sample
Fireburnt working sample working sample
Fusarium damage 10 100
Heated 50 250
Matter other than cereal grains 50 250
Odour working sample working sample
Other cereal grains, excluding wheat 50 250
Sclerotinia sclerotiorum 500 working sample
Smudge working sample working sample
Soft earth pellets working sample working sample
Sprouted 10 50
Stones 250 working sample
Treated seeds working sample working sample
Wheat 50 250
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