Oats – Chapter 7
Official Grain Grading Guide

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Export grade determinants tables

Oats, Canada Western (CW)

Grade name	(1) Total material through No. 4.5 round hole sieve %	(2) Small seeds %	(3) Large seeds through No. 5 buckwheat sieve %	(4) (1) + (3) Total removable material %
No. 1 CW	0.2	0.10	0.2	0.2
No. 2 CW	0.2	0.10	0.2	0.2
No. 3 CW	0.2	0.10	0.2	0.2
No. 4 CW	0.2	0.10	0.2	0.2

The columns 1 to 4 refers to factors which are assessed in determining commercial cleanlines.

Grade name	Damage and foreign material
	Damage			Barley %	Cereal grains other than wheat or barley %	Ergot %	Large seeds %
	Frost %	Heated / Rotted %	Total damage %
No. 1 CW	0.1	Nil	2	0.75	1	Nil	0.2
No. 2 CW	4	0.1	4	1.5	2	0.025	0.3
No. 3 CW	6	0.5	6	3	3	0.025	0.5
No. 4 CW	No limit	1	8 excluding frost	8	8	0.05	1

Grade name	Damage and foreign material
	Mineral matter		Sclerotinia %	Wheat %	Wild oats %	Total damage and foreign material %
	Stones %	Total %
No. 1 CW	0.017	0.033	Nil	0.75	1	2
No. 2 CW	0.066	0.066	0.025	1.5	2	4
No. 3 CW	0.15	0.25	0.025	3	3	6
No. 4 CW	0.15	0.25	0.25	8	8	8 excluding frost

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