Canadian Grain Commission
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Experimental grades of wheat and barley – Chapter 24
Official Grain Grading Guide



Primary grade determinants tables

Wheat, Canada Western Experimental (CW EXPRMTL)

Grade name Standard of quality
Minimum test weight kg/hl (g/0.5 L) Variety Degree of soundness Minimum hard vitreous kernels %
No. 1 CW EXPRMTL 79 (385) Any wheat variety of the class Canada Western Experimental designated as such by Order of the Commission Reasonably well matured, reasonably free from damaged kernels 65
No. 2 CW EXPRMTL 77.5 (378) Fairly well matured, may be moderately bleached or frost-damaged, reasonably free from severely damaged kernels 35
No. 3 CW EXPRMTL 76.5 (373) May be frost-damaged, immature or weather-damaged, moderately free from severely damaged kernels No minimum
CW Feed 65 (315) Any type or variety of wheat excluding amber durum Reasonably sweet, excluded from other grades of wheat on account of damaged kernels No minimum
Grade, if specs for CW Feed not met Wheat, Sample CW Account Light Weight      
Grade name Foreign material Wheats of other classes or varieties
Ergot % Excreta % Matter other than cereal grains % Sclerotinia % Stones % Total % Contrasting classes % Total %
No. 1 CW EXPRMTL 0.01 0.01 0.2 0.01 0.03 0.4 0.5 1.5
No. 2 CW EXPRMTL 0.02 0.01 0.2 0.02 0.03 0.75 1.5 3
No. 3 CW EXPRMTL 0.04 0.015 0.2 0.04 0.06 1.25 2.5 5
CW Feed 0.1 0.03 1 0.1 0.1 10 No limit—but not more than 10% amber durum
Grade, if specs for CW Feed not met Wheat, Sample CW Account Ergot  Wheat, Sample CW Account Excreta  Wheat, Sample CW Account Admixture  Wheat, Sample CW Account Admixture  2.5% or less–Rejected (grade) Account Stones Over 2.5%–Wheat, Sample Salvage  See Mixed grain  Over 10% amber durum—Wheat, Sample CW Account Admixture 
Grade name Artificial stain, no residue % Dark, immature % Degermed % Fireburnt % Fusarium damage % Grass green % Grasshopper, army worm % Heated
Binburnt, severely mildewed, rotted, mouldy % Total $
No. 1 CW EXPRMTL Nil 1 4 Nil 0.25 0.75 1 0.005 0.05
No. 2 CW EXPRMTL 0.05 2.5 7 Nil 1.0 2 3 0.020 0.4
No. 3 CW EXPRMTL 0.1 10 13 Nil 2 10 8 0.030 1.0
CW Feed 2 No limit No limit 2 5 No limit No limit 2.5 2.5
Grade, if specs for CW Feed not met Wheat, Sample CW Account Stained Kernels     Wheat, Sample CW Account Fireburnt Over 5%—Wheat, Sample CW Account Fusarium Damage Over 10%– Wheat, Commercial Salvage       Wheat, Sample CW Account Heated
Grade name Natural stain % Pink % Sawfly, midge % Shrunken and broken Smudge and blackpoint Sprouted
Shrunken % Broken % Total % Smudge % Total % Severely sprouted % Total %
No. 1 CW EXPRMTL 0.5 1.5 2.0 4 5 7 0.30 10 0.1 0.5
No. 2 CW EXPRMTL 2 5 5 4 6 8 1 20 1.5
No. 3 CW EXPRMTL 5 10 10 4 7 9 5 35 5
CW Feed No limit No limit No limit 4 13 15 No limit No limit No limit
Grade, if specs for CW Feed not met         Sample Broken Grain