Grading Page Content UNDERSTAND TESTING AND GRADING FACTORS Grain grades provide a common tool for the grain sector to define and determine quality. The Canadian Grain Commission’s Official Grain Grading Guide lists 23 grading factors for canola, covering sprouting, foreign material, colour and more. Meeting grade tolerances is key to ensuring canola oil’s high quality and strong global reputation. DID YOU KNOW? The two most common downgrading factors for canola are: 1. Distinctly green seeds; and 2. Heated seeds.See a list of Companies that Buy Off-Grade Canola (CanolaWatch article, updated 2019). GET THE COLOUR GUIDES (Colours in photo are not for official use. Photo is property of Canadian Grain Commission.)The Canadian Grain Commission provides Canola/Rapeseed Colour and Heated Colour Guides for guidance on consistently determining what constitutes distinctly green and heated canola seeds. You can use these bookmark-sized guides at harvest, during storage, and prior to delivery to assess the quality of your canola. The Canola/Rapeseed Colour and Heated Colour Guides are free to farmers. Contact the Canadian Grain Commission for a copy, or drop by a CGC booth at a trade show. Maintain your Colour Guide’s integrity to ensure the colour remains accurate. Always store guides in an envelope or cabinet, away from sun or direct light and at room temperature. ASSESSING COLOUR To get started:Clean a representative sample. Crush a minimum of 500 seeds (maximum of 1,000 seeds) from your sample using a roller and a seed stick. Assess the crushed seeds against the Colour Guide. DISTINCTLY GREEN (DGR) AND COLOUR (CLR) (Colours in photo are not for official use. Photo is property of Canadian Grain Commission.) The seed must be distinctly green throughout the entire seed to be considered distinctly green (use your Colour Guide to compare the colour). Crushed seeds which are pale green (lime) or slightly immature and seeds with a degree of discolouration are assessed in the evaluation of colour, but are not considered "distinctly green". Read the Canola Watch article Grading for Green: Two Limes Don’t Make a Green (November 2018)No. 1 Canola can contain up to 2% distinctly green seed (20 seeds per 1,000). No. 2 Canola can contain up to 6% distinctly green seed (60 seeds per 1,000). No. 3 Canola can contain up to 20% distinctly green seed (200 seeds per 1,000). HEATED (HTD) (Colours in photo are not for official use. Photo is property of Canadian Grain Commission.) Heated seeds refer to crushed seeds that are black (badly binburnt), dark brown (distinctly heated), and light tan seeds emitting a heated odour or a combination of these. On the Colour Guide, light tan seeds (without a heated odour) are lighter than distinctly heated but darker than sound canola and are graded as damage. DID YOU KNOW? Just one heated seed significantly reduces the value of your canola. A maximum of 0.1% heated seed is permissible for No. 1 Canola (1 seed per 1,000). • No. 2 Canola can contain up to 0.5% heated seed (5 seeds per 1,000). • No. 3 Canola can contain up to 2% heated seed (20 seeds per 1,000). DAMAGE (DMG) No. 1 Canola can contain up to 5% damaged canola (50 seeds per 1,000). Damage includes seeds that are distinctly shrunken or shriveled; badly discoloured from mould or completely covered with rime; and excessively weathered, sprouted, tan colour, distinctly green, heated, insect or otherwise damaged. Damage is the total of damaged crushed seeds and any visually damaged uncrushed seeds. • No. 2 Canola can contain up to 12% damaged seed (120 seeds per 1,000). • No. 3 Canola can contain up to 25% damaged seed (250 seeds per 1,000).