Triticale: Determination of dockage

Definitions

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 the following 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 is assessed in two stages.

1. Follow Normal cleaning procedures, using the Carter dockage tester.
2. Follow procedures for Cleaning for grade improvement. This cleaning can be done at any time after the cleaning assessment has been completed.

Dockage not reported

Normal cleaning procedures

1. Set up the Carter dockage tester as follows:

   Feed control	# 6
   Air control	# 5
   Riddle	NumberNo. 25
   Top sieve	NumberNo. 6 buckwheat
   Centre sieve	NumberNo. 5 buckwheat
   Bottom sieve	Blank tray
   Sieve cleaner control	Off

2. 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.
3. Turn on the Carter dockage tester.
4. Pour the sample into the hopper.
5. After the sample has passed through the machine, turn on the sieve cleaner control for 2 to 3 seconds to remove kernels lodged in the sieve.
6. Turn off the dockage tester.
7. Lightly snap the retainer rod of the aspiration pan to loosen material gathered on the air screen.
8. Examine the material passing through the NumberNo. 5 buckwheat sieve.

   If any significant amount of small whole triticale passed through the NumberNo. 5 buckwheat sieve, you must resieve this portion over the NumberNo. 5 buckwheat hand sieve. Return any triticale remaining on the sieve to the cleaned sample.

9. Handpick sound large kernels of triticale from the portion passing over the riddle and return them to the cleaned sample. Do not pick kernels with long sprouts. See Composition of dockage and Sprouted.
10. Determine dockage, using the list under Composition of dockage.

Composition of dockage

Dockage includes

• Triticale with long sprouts removed by the riddle.
  • For samples of triticale which are graded Triticale Sample CAN Account Sprouted any triticale with long sprouts that was removed by the riddle will be returned to the sample and not assessed as dockage. (See Sprouted)
• Soft earth pellets, up to a maximum of 10% of the gross weight of the sample, handpicked from the clean sample
• Material other than triticale removed by the No. 25 riddle
• Material removed by aspiration
• Material that has passed through the NumberNo. 5 buckwheat Carter sieve
• Material removed by Cleaning for grade improvement

Cleaning for grade improvement

If the grade of a sample can be improved by additional cleaning, perform the cleaning and add the additional material to dockage. Cleaning for grade improvement can be done at any time after the cleaning assessment has been completed, including on export.

1. After the cleaning assessment has been completed, sieve the sample by hand using the appropriate sieve. See the table Cleaning for grade improvement—Triticale for the list of sieves.

   Important: When you use a hand sieve, move the sieve from left to right 30 times, using a sifting motion. One time is one complete motion from the centre, to one side, to the other side, and back to the centre. The total distance from left to right is 20 cm, or about 8 inches.

2. Weigh the additional dockage and add it to the original dockage.

Optional analysis

Where a shipper requests special cleaning of a carlot of grain at a terminal elevator, and the elevator manager agrees, dockage material will be analyzed for the presence of grain. The percentage and grade of any grain contained in the dockage will be reported.