Experimental grades of wheat: Classes and varieties, cleaning, and grading

Classes and varieties

A variety from any class of wheat may be approved for eligibility for experimental grades. The class of wheat is noted in the remarks on inspection records.

Samples containing admixtures of registered Canadian or foreign varieties in excess of 5.0% by weight are graded ‘Canada Western Feed’.

Cleaning

• Dockage is assessed using the procedure described in Chapter 4 of this Guide.
• All special cleaning described in Chapter 4 is applied to experimental grades, provided that the grade can be improved.

Feed or sample grades

Samples eligible for experimental grades but displaying grading factors other than stones that are above established tolerances are graded ‘Canada Western Feed’ or ‘Sample’ depending on the severity of the grading factors.

Rounding rules

Rounding rules are outlined in schedule 3 of the Canada Grain Regulations. When official inspection results are expressed numerically, they should be expressed to the same decimal precision as the applicable tolerance in the primary grade determination tables.

Representative portion for grading

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

The optimum representative portion is the representative sample size within the minimum and maximum range used to obtain the most accurate result when assessing an objective factor. It is determined by taking into consideration the tolerance and concentration of the objective factor being assessed.

See Wheat chapter for Representative portion of wheat for grading.