SWI 132.1.1 Seed Program
Specific Work Instruction
Official Seed Sampling

Appendix I: Approved Sampling Equipment

This page is part of the Guidance Document Repository (GDR).

Looking for related documents?
Search for related documents in the Guidance Document Repository

  • Small - Nobbe or Double sleeve trier with slot size width 8 mm to 14 mm
  • Medium - Nobbe or Double sleeve trier with slot size width 15 mm to 19 mm
  • Large - Nobbe or Double sleeve trier with slot size width 20 mm or greater

It is not permissible to use a trier for sampling any crop kind that is smaller than that stated in this table unless the sampler provides evidence that the width of the opening is, at a minimum, two times the diameter of the seed. It is permissible to use a larger trier when there is evidence that a representative sample cannot be obtained with trier size provided below.

Crop Kind-Trier (Size)

  • Alfalfa - Small
  • Alkali grass, weeping - Small
  • Artichoke, Cardoon - Medium
  • Asparagus - Medium
  • Barley - Large
  • Bean, broad, garden, faba, field, lima and scarlet runner - Large
  • Bean, mung - Medium
  • Beet - Medium
  • Bent grasses - Small
  • Bluegrasses - Small
  • Brassica spp. - Small
  • Brome grass, meadow or smooth - Medium
  • Brome grass, sweet - Large
  • Buckwheat - Medium
  • Camelina - Small
  • Canary grasses (other than reed) - Medium
  • Canary grass, reed - Small
  • Cantaloupe - Large
  • Carrot - Small
  • Celery, Celeriac - Small
  • Chervil, turnip - rooted - Medium
  • Chickpea - Large
  • Chicory, cultivated - Small
  • Chives - Small
  • Citron, Watermelon - Large
  • Clovers - Small
  • Corn - Large
  • Corn salad - Small
  • Cowpea - Large
  • Cress, garden or water - Small
  • Cucumber - Large
  • Dandelion, cultivated - Medium
  • Dill - Medium
  • Dog tail, crested - Medium
  • Eggplant - Small
  • Emmer - Large
  • Endive - Small
  • Fescues - Medium
  • Flax - Medium
  • Foxtails - Medium
  • Gherkin - Medium
  • Industrial hemp - Medium
  • Leek - Small
  • Lentil - Medium
  • Lettuce, Celtus - Medium
  • Lespedeza spp. - Small
  • Lupines - Large
  • Mangel - Medium
  • Medick, black - Small
  • Milk - vetch, cicer - Small
  • Millet, proso, foxtail or Italian - Small
  • Millet, pearl or Japanese - Medium
  • Muskmelon - Large
  • Mustard, black, oriental or Indian, white - Small
  • Oat - Large
  • Oat grass, tall - Medium
  • Okra - Medium
  • Onion - Small
  • Orchard grass - Medium
  • Parsley - Medium
  • Parsnip - Medium
  • Pea - Large
  • Peanut - Large
  • Pepper - Medium
  • Phacelia spp. - Small
  • Pumpkin - Large
  • Radish - Medium
  • Rampion - Small
  • Rape, forage - Small
  • Rapeseed, oil seed rape including canola - Small
  • Redtop - Small
  • Rhubarb - Medium
  • Rye - Large
  • Ryegrasses - Medium
  • Safflower - Medium
  • Sage - Small
  • Sainfoin - Medium
  • Salsify - Large
  • Savory - Small
  • Sorghum spp. - Medium
  • Sorrel, garden - Small
  • Soybean - Large
  • Soybean, natto - type - Medium
  • Spelt, caryopses - Medium
  • Spelt, spikelets - Large
  • Spinach, New Zealand - Large
  • Spinach - Large
  • Squash - Large
  • Sudan grass - Medium
  • Sunflower - Large
  • Swiss chard - Medium
  • Thyme - Small
  • Timothy - Small
  • Tobacco - Small
  • Tomato - Small
  • Trefoil, bird's - foot - Small
  • Triticale - Large
  • Vetch, crown or kidney - Small
  • Vetches (other than crown or kidney) - Medium
  • Wheat, durum - Large
  • Wheat, common - Medium
  • Wheatgrasses - Medium
  • Wild - ryes - Medium
  • Broccoli, Brussel sprouts, cabbage–Small
  • Kale, kohlrabi, rutabaga(swede), turnip - Small
  • Spinach mustard, vegetable marrow - Small
  • Very chaffy grasses - Hand or stream sampling
  • Seed mixtures: forage, lawn and turf, ground cover - Based on size of largest component in the mixture

Note:

  1. For horizontal probing of large containers, Nobbe and sleeve triers must reach to the centre of the container if the container can be probed from both sides.
  2. Probing of very chaffy grasses in large containers is difficult. Sampling is best done by stream sampling as the container is filled or by hand sampling.
  3. When sampling kinds other than those in this table, the sampler must refer to Section 7.2 (Paragraph 2) for specific guidance on which trier size to use for such types of seed.
  4. When sampling vertically, the sampler must use the partitioned trier.
  5. Hand sampling can be used for all species but is most suitable for chaffy, non free-flowing grasses where the seed would be damaged by use of a trier, specialty seed (e.g., seeds mats, seed tapes) or where there could be separation and selection of the seed.
Date modified: