Peas – Chapter 16 | Official Grain Grading Guide

Determination of dockage


Dockage is assessed and recorded to the nearest 0.1%.

Dockage is defined under the Canada Grain Act as “any material intermixed with a parcel of grain, other than kernels of grain of a standard of quality fixed by or under this Act for a grade of that grain, that must and can be separated from the parcel of grain before that grade can be assigned to the grain.” Dockage is removed by following the cleaning procedures described in this section of the guide.

The sample as it arrives is referred to as the uncleaned or dirty sample. Its weight is the gross weight of the sample. Dockage is assessed on the gross weight of the sample.

Dockage not reported


Dockage is not reported for samples grading:

  • Peas, Sample Canada (colour or variety) Account Fireburnt
  • Peas, Sample Salvage
  • Peas, Sample Condemned
  • Feed Peas, Canada

Normal cleaning procedures


Wear gloves and a mask to handle any samples that you suspect may contain hazardous substances.

  1. Using a Boerner-type divider, divide the uncleaned sample to obtain a representative portion.
    • Official samples shall be at least 1 kg.
    • Unofficial samples shall be at least 1 kg.
  2. Sieve portions of approximately 250 grams at a time.
  3. Sieve the sample over the slotted sieve that will achieve maximum removal of splits with minimum loss of whole peas. Use one of the following sieves: No. 8 slotted, No. 9 slotted, No. 11 slotted
  4. Determine dockage, using the list under Composition of dockage.

Composition of dockage

  • All coarse foreign vegetable matter such as pods, stems, straw, and thistle tops handpicked from the sieved sample
  • Split peas removed through sieving—Split peas removed by sieves are handpicked from the dockage material and calculated as a percentage based on the gross weight of the sample. This portion is recorded as the percentage of splits in dockage
  • Other material removed through sieving including pea hulls