Statistics Act, 1999
R 385
Agricultural Product Standards Act, 1990 (Act No. 119 of 1990)RegulationsRegulations relating to the Grading, Packing and Marking of Bread Wheat intended for sale in the Republic of South AfricaPart VI : Determination of Percentage Deviations18. Determination of percentage screenings |
| (1) | The percentage screenings in a consignment of wheat shall be determined as follows: |
| (a) | Obtain a working sample of at least 500 g. |
| (b) | Place the sample on the standard sieve and screen the sample by moving the sieve 50 strokes to and fro, alternately away from and towards the operator of the sieve, in the same direction as the long axes of the slots of the sieve. Move the sieve, which rests on a table or other suitable smooth surface, 250 mm to 460 mm away from and towards the operator with each stroke. The prescribed 50 strokes must be completed within 50 to 60 seconds: Provided that the screening process may also be performed with the standard sieve in some or other container or an automatic sieving apparatus. |
| (c) | Determine the mass of the material that has passed through the sieve and express it as a percentage of the mass of the working sample. |
| (d) | Such percentage represents the percentage screenings in the consignment. |
