Divide and reduce a sample

To make a 1-kilogram sample

Step 1 - 4 pails: 2 marked A, 2 marked B
Step 1. Pour samples from grain stream into pail A. Keep second pail A for a composite sample.
Step 2 - Mixing grain by hand in pail A
Step 2. Mix contents of pail A.
Step 3 - Pouring grain from pail A into both pails marked B
Step 3. Pour contents of pail A down the centre.
Step 4 - Pouring grain from pail B into pail A
Step 4. Pour contents of pail B back into pail A. Return contents of other pail B to bin.
Step 5 - Pouring grain from pail A into both pails marked B
Step 5. Repeat the process with the reduced sample.
Step 6 - Pouring grain from pail B into pail A
Step 6. Pour final sample into second pail A to make your composite sample.
Step 7 - Pouring grain from pail A into a small container
Step 7. Pour 1-kilogram samples into containers.

Definition

Composite sample
A composite sample is composed of a number of distinct portions, each obtained in a prescribed manner from consecutive samples. The portions are blended to make the composite.