Experimental grades of wheat - Chapter 24 | Official Grain Grading Guide

Wheat

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 procedures 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.

Representative portion for grading

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

The terms “Minimum” and “Maximum” refer to the range of sample portion size to be analyzed when an objective factor is present. The optimum representative portion (see glossary) is determined by taking into consideration the tolerance and concentration of the objective factor being assessed.

See wheat chapter for Representative portions, grams

Grading factors

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.

Contaminated grain

Contaminated grain

Important:

Wear gloves and a mask to handle any sample that is suspected of containing contaminated grain.

Contaminated is defined in the “Canada Grain Act” as; “Contaminated means, in respect of grain, containing any substance in sufficient quantity that the grain is unfit for consumption by persons or animals or is adulterated within the meaning of the regulations made pursuant to sections B.01.046(1), B.15.001 and B.15.002(1) of the Food and Drugs Act.”

Samples deemed to be contaminated by the Grain Research Laboratory in consultation with the Chief Grain Inspector for Canada are graded Wheat, Sample Condemned.

Degermed

Degermed

Tolerances apply to kernels not classed as sprouted.

Fertilizer pellets (FERT PLTS)

Fertilizer pellets (FERT PLTS)

Fertilizer pellets are a manufactured plant nutrient product used by producers in the production of grain. They are typically small, round or irregular shaped and usually white, grey, brown, pink or reddish in colour.

Note:

Canadian Grain Commission personnel should refer to ISO national work instruction “Suspect Contaminated Grain, Handling Procedures” for procedures to be followed when handling samples containing fertilizer pellets.

Procedures

  • Handpick any fertilizer pellets and determine the concentration basis the net working sample.
  • Fertilizer pellets are assessed as stones when the concentration does not exceed 1.0% of the net sample weight.
  • Samples containing fertilizer pellets in excess of 1.0% of the net sample weight are graded Wheat, Held IP Suspect Contaminated Grain.
Grass green

Grass green

Tolerances are only a guide. Consider the overall quality of the sample.

Hard vitreous kernels

Hard vitreous kernels

Vitreousness is the natural translucent colouring that is a visible sign of kernel hardness. It is a factor for hard wheat varieties only. For a full description, see Chapter 4.

Insect damage

Insect damage

Consider the overall quality of the sample.

Stones (STNS)

Stones (STNS)

Stones are hard shale, coal, hard earth pellets, and any other non toxic materials of similar consistency. Fertilizer pellets are assessed as stones when constituting 1.0% or less of the net sample weight. (See Fertilizer pellets for specific procedures to be followed when samples contain fertilizer pellets.)

Procedures

  1. Handpick stones from a representative portion of the cleaned sample.
  2. Determine stone concentration in the net sample.
Note:

Stones may be removed and included in dockage if the the material removed is 5.0% or less of the gross weight of the sample. See Cleaning for grade improvement.

  • In western Canada samples of grain containing stones in excess of “basic grade” tolerances, up to 2.5% are graded Wheat, Rejected “basic grade” Account Stones. The “basic grade” refers to a grade established in the Canada Grain Regulations (grades listed in the first column in grade determinant tables) that would have been assigned to the sample if it contained no stones.
  • In western and eastern Canada grain containing more than 2.5% stones is graded Wheat, Sample Salvage.

Examples: Western Canada

Excerpt from grade determinant tables for Wheat, Canada Western Experimental
Grade name Stones %
No. 1 CW EXPRMTL 0.03
No. 2 CW EXPRMTL 0.03
No. 3 CW EXPRMTL 0.06
CW Feed 0.10

Basic grade:....................... Wheat, No. 3 Experimental

Reason for basic grade:...... Mildew

Grade in Western Canada if stones found.
If the above sample contained Grade in Western Canada
0.08% stones Wheat, Rejected No. 3 CW Experimental Account Stones
3.0% stones Wheat, Sample Salvage
Treated seed and other chemical substances

Treated seed and other chemical substances

Treated seed

Treated seed is grain that has been coated with an agricultural chemical for agronomic purposes. These seed dressings contain a dye to render the treated seed visually conspicuous. The colour of the dye varies depending upon the type of treatment and the type of grain. The current Canadian colour standards for pesticide seed treatments for cereals is pink or red and for canola is baby blue, white and green. Seed treated with an inoculant may have a green stain. The coatings or stains may appear greasy or powdery and surface area distribution ranges from tiny flecks to complete coverage.

Other chemical substances

Other chemical substances refers to any chemical residues either adhering to the kernel or remaining in the sample and to samples having a chemical odour of any kind.

Important:

Wear gloves and a mask to handle any sample that is suspected of containing contaminated grain.

Procedures

If a sample is suspected of being coated with a pesticide, desiccant, inoculant or if the sample contains evidence of any foreign chemical substance other than fertilizer pellets, the sample shall be graded Wheat, Held IP Suspect Contaminated Grain.

Note:

Canadian Grain Commission personnel should refer to ISO national work instruction “Suspect Contaminated Grain, Handling Procedures” for specific procedures to be followed when handling samples suspected of containing treated seed or other chemical substances.

Primary grade determinants tables

Wheat, Canada Western Experimental (CW EXPRMTL)

Wheat, Canada Western Experimental (CW EXPRMTL)

Primary grade determinants Wheat, Canada Western Experimental (CW EXPRMTL)- 1
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 class or variety of wheat excluding amber durum and any variety of the class CWSP 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      
Primary grade determinants Wheat, Canada Western Experimental (CW EXPRMTL)- 2
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 
Primary grade determinants Wheat, Canada Western Experimental (CW EXPRMTL)- 3
Grade name Wheats of other classes or varieties Artificial stain, no residue % Dark, immature % Degermed % Fireburnt % Fusarium damage % Grass green % Grasshopper, army worm % Heated
Contrasting classes % Total % Binburnt, severely mildewed, rotted, mouldy % Total $
No. 1 CW EXPRMTL 0.5 1.5 Nil 1 4 Nil 0.25 0.75 1 0.005 0.05
No. 2 CW EXPRMTL 1.5 3 0.05 2.5 7 Nil 1.0 2 3 0.020 0.4
No. 3 CW EXPRMTL 2.5 5 0.1 10 13 Nil 2 10 8 0.030 1.0
CW Feed 10%, either alone or in combination with each other, of amberdurum and any variety of the class CWSP 2 No limit No limit 2 5 No limit No limit 2.5 2.5
Grade, if specs for CW Feed not met Over 10% amber durum - Wheat, Sample CW Account Admixture   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
Primary grade determinants Wheat, Canada Western Experimental (CW EXPRMTL)- 4
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