Domestic mustard seed - Chapter 12 | Official Grain Grading Guide

Export shipments

Export shipments can be commercially clean or not commercially clean.

Commercially clean

Shipments defined as commercially clean when the net dockage does not exceed 2.5% of the sample weight.

Dockage is reported to the nearest

  • 0.1% for samples representing commercially clean shipments loaded from a single terminal elevator
  • 0.01% for composite samples representing shipments loaded from more than one terminal elevator

A deduction for broken and reasonably sound mustard seed handpicked from the material and removed as dockage is allowed

  • On shipments not for direct export, of up to 0.50%
  • On shipments for direct export, of up to 0.75%
  • On shipments ex primary elevators, of up to 0.50%

Not commercially clean (NCC)

Shipments that do not meet the standards for commercial cleanliness are referred to as not commercially clean. Such shipments are allowed only with the permission of the Canadian Grain Commission.

For samples representing not commercially clean shipments approved by the Canadian Grain Commission for shipment from terminal elevators, dockage is reported to the nearest

  • 0.1% for samples representing shipments loaded from a single terminal elevator
  • 0.01% for composite samples representing shipments loaded from more than one terminal elevator

Instead of the allowances for broken seed in commercially clean shipments, a direct deduction of up to 0.2% is applied to establish net dockage for direct shipments only.

Determination of dockage

Follow procedures for normal cleaning, with the Carter dockage tester set up as follows.
Setting Export
Feed control #3
Air control #5
Riddle No. 000
Top sieve Blank tray
Centre sieve None
Bottom sieve None
Sieve cleaner control Off
You will also need the following hand sieves.
Round-hole hand sieves Slotted hand sieves
No. 5.5 No. .028
No. 6 No. .032
No. 6.5  
No. 7  
No. 7.5  

Composition of dockage

In export domestic mustard seed shipments, dockage consists of

  • Material other than mustard which passes over the No. 000 riddle or remains ontop of the round-hole sieve
  • Material that passes through the No. .028 or No. .032 slotted hand sieve, less the applicable allowance for broken or reasonably sound small whole mustard seed
  • Material removed by aspiration

Grading

Domestic mustard seed on export is graded in accordance with export specifications. Where there are no export specifications, the primary specifications are used.