Official Grain Grading Guide

Buckwheat: Determining the size of buckwheat

Chapter 13. Buckwheat (PDF, 790 KB)

Using a Boerner-type divider, divide a representative portion of approximately 250 g from the cleaned sample.
Set up the Carter dockage tester as follows.

Set up the Carter dockage tester
Feed control # 6
Air control Off
Riddle None
Top sieve numberNo. 8 slotted
Centre sieve Blank tray
Bottom sieve None
Sieve cleaner control Off
Turn on the Carter dockage tester.
Pour the portion into the hopper.
Turn off the Carter dockage tester.
Determine the percentage by weight of the kernels passing through the numberNo. 8 slotted sieve.

If the percentage of kernels passing through the numberNo. 8 slotted sieve is: Then the buckwheat is:
20.0 or less Large
More than 20.0 Small

If the percentage of kernels passing through the numberNo. 8 slotted sieve is:	Then the buckwheat is:
20.0 or less	Large
More than 20.0	Small

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2026-08-01