Official Grain Grading Guide

Wheat: Export grade determination tables for Canada Prairie Spring White (CPSW) wheat

Chapter 4. Wheat (PDF, 2 MB)

Wheat, Canada Prairie Spring White (CPSW)

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Download a poster version of the export grade determination table for CPSW, 61 x 91 cm (24 x 36 in) (PDF, 203 KB)

Samples of CPSW will be graded no lower than No. 2 CPSW on account of mildew

Wheat, Canada Prairie Spring White (CPSW), standard of quality
Grading factor	No. 1 CPSW	No. 2 CPSW	CW Feed
Degree of soundness^{Footnote 1}	Fairly well matured, may be moderately bleached or frost-damaged, reasonably free from severely damaged kernels	May be frost-damaged, immature or weather-damaged, moderately free from severely damaged kernels	Reasonably sweet, excluded from higher grades on account of light weight or damaged kernels
Minimum test weight kg/hL (g/0.5 L)	77 (375)	75 (365)	73 (355)
Variety	Any variety of the class CPSW designated as such by order of the Commission	Any variety of the class CPSW designated as such by order of the Commission	Any class or variety of wheat excluding amber durum and any variety of the class CWSP
Table 1 Notes Footnote 1 See Frost (FR) and Mildew (MIL) for applicable standard Return to footnote 1 referrer

Wheat, Canada Prairie Spring White (CPSW), foreign material
Grading factor	No. 1 CPSW	No. 2 CPSW	CW Feed
Ergot %	0.04	0.04	0.10
Excreta %	0.01	0.03	0.03
Matter other than cereal grains %	0.2	0.3	1.0
Other cereal grains %	0.8	1.5	5.0
Sclerotinia %	0.04	0.04	0.10
Stones %	0.03	0.03	0.10
Total % Mineral matter including stones	0.10	0.10	0.25
Total % Foreign material^{Footnote 2}	0.8	1.5	5.0
Table 2 Notes Footnote 2 Total foreign material (TFM) includes all components in the commercially clean determination table except broken wheat passing through the No.5 buckwheat sieve Return to footnote 2 referrer

Wheat, Canada Prairie Spring White (CPSW), grading factors
Grading factor	No. 1 CPSW	No. 2 CPSW	CW Feed
Contrasting classes %	3	5	10%, either alone or in combination with each other, of amber durum and any variety of the class Canada Western Special Purpose (CWSP)
Total % Wheats of other classes or varieties and contrasting classes^{Footnote 3}	5	10	10%, either alone or in combination with each other, of amber durum and any variety of the class Canada Western Special Purpose (CWSP)
Artificial stain, no residue %	0.1	0.1	2.0
Dark immature %	2.5	10.0	No limit
Degermed %	7	13	No limit
Fireburnt %	0.0	0.0	2.0
Fusarium damage %	1.5	1.5	4.0
Grass green %	2	10	No limit
Insect damage %	3	8	No limit
Binburnt, severely mildewed, rotted, mouldy %	0.02	0.03	2.50
Total % Heated, binburnt, severely mildewed, rotted, mouldy	0.4	1.0	2.5
Natural stain %	2	5	No limit
Pink %	5	10	No limit
Sawfly, midge %	3	8	No limit
Shrunken %	5	5	4
Broken %	6	6	13
Total % Shrunken and broken	9	9	15
Penetrated smudge %	0.10	0.50	No limit
Total % Smudge	1	5	No limit
Total % Smudge and blackpoint	20	35	No limit
Severely sprouted %	0.10	0.30	No limit
Total % Sprouted	0.5	2.0	No limit
Table 2 Notes Footnote 3 See working tolerance for Wheats of Other Classes or Varieties (WOOC) Return to footnote 3 referrer

2026-08-01