10.1. General Procedure:
(a) In order to secure a representative
sample, equal portions shall be taken from evenly distributed parts of the
quantity of seed to be sampled. Access shall be had to all parts of that
quantity.
(b) For free-flowing seed
in bags or bulk, a probe or trier, shall be used. For small free-flowing seed
in bags a probe or trier long enough to sample all portions of the bag shall be
used.
(c) Nonfree-flowing seeds,
such as certain grass seed, uncleaned seed, or screenings, difficult to sample
with a probe or trier, shall be sampled by thrusting the hand into the bulk and
withdrawing representative portions.
(d) Composite samples shall be obtained to
determine the quality of a lot of seed, such as the percentages of pure seed,
other crop seed, weed seed, inert matter, noxious weed seed, germination,
varietal purity, freedom from disease, and effectiveness of seed treatment.
Individual bag samples may be obtained to determine whether the seed is of
uniform quality.
10.2.
Sampling Equipment:
For sampling seeds in bags a trier long enough to reach all
areas in the bag shall be used. The trier shall be so designed that it will
remove an equal volume of seed from each part of the bag through which the
trier travels. Unless the trier has partitions in the seed chamber it must be
inserted into the bags horizontally. Nonfree-flowing seeds difficult to sample
with a trier shall be sampled by thrusting the hand into the seed and removing
representative portions. When a sample is taken with the hand, insert the hand
flat and with the fingers together. Keep the fingers together as the hand is
closed and withdrawn. Because of possible segregation, hand samples should be
taken from various points in bags or in bulk.
10.3.
Obtaining a "Submitted
Sample":
(a) Seed in Bags:
(1) When more than one core is drawn from a
bag, follow different paths. When more than one handful is taken from a bag,
take them from well separated points.
(2) For lots of one to six bags, sample each
bag and take a total of at least five cores or handfuls.
(3) For lots of more than six bags, sample
five bags plus at least 10% of the number of bags in the lot. Round numbers
with decimals to the nearest whole number. Regardless of the lot size, it is
not necessary to sample more than thirty bags.
|
Examples:
|
|
No. bags in lot
|
7
|
10
|
23
|
50
|
100
|
200
|
300
|
400
|
|
No. bags to sample
|
6
|
6
|
7
|
10
|
15
|
25
|
30
|
30
|
(b) Bulk Seed: To obtain a composite sample,
take at least as many cores or handfuls as if the same quantity of seed were in
bags of an ordinary size. Take the cores or handfuls from well distributed
points throughout the bulk.
(c)
Seed in small containers: Seed in small containers shall be sampled by taking
entire unopened containers in sufficient number to supply a minimum size sample
as required in Part 10.4. The contents of a single container or the combined
contents of multiple containers of the same lot shall be considered
representative of the entire lot of seed sampled.
10.4. Size of Submitted Sample:
(a) For the composite sample to test for
quality. The following are minimum weights for samples of seed to be submitted
for analysis, test or examination.
(1) Two
ounces (approximately 55 grams) of grass seed not otherwise mentioned, white or
alsike clover, or seeds not larger than these.
(2) Five ounces (approximately 150 grams) of
red or crimson clover, alfalfa, lespedezas, ryegrasses, bromegrasses, millet,
flax, rape, or seeds of similar size.
(3) One pound of sudangrass, proso, or seeds
of similar size.
(4) Two pounds
(approximately 1,000 grams) of cereals, vetches, sorghums, or seeds of similar
or larger size.
(5) Vegetable and
ornamental seed samples shall consist of at least 800 seeds per sample. If a
purity analysis or a noxious weed seed examination is required, the submitted
sample shall provide at least the minimum weights of working samples set forth
in Association of Official Seed Analysts Rules for Testing Seeds (October
2019). (As to incorporation of materials see Part 14.)
(6) Tree and shrub seed samples shall consist
of at least 600 seeds per sample for germination purposes (1,000 seeds for
paired tests). If a purity analysis or a noxious weed seed examination is
required, the submitted sample shall provide at least the minimum weights of
working samples set forth in Association of Official Seed Analysts Rules for
Testing Seeds (October 2019). (As to incorporation of materials see Part
14.)
(b) For individual
bag samples to test for uniformity:
(1) The
size of any individual bag sample to determine uniformity in a lot of seed
shall be not less than the quantities set out in the column "Minimum Weight for
Noxious Weed Seed Examination" for the respective kinds of seed listed in Table
1, found in Association of Official Seed Analysts Rules for Testing Seeds,
(October 2019). (As to incorporation of materials see Part 14.)
(2) If the sample drawn is larger than
required it shall be thoroughly mixed before it is divided to the desired
size.
10.5.
Forwarding and Receipt of Official Samples: Before being forwarded to analysis,
test, or examination the containers of official samples shall be properly
sealed, identified, initialed and dated.
Notes
8 CCR 1203-6, pt. 10
42
CR 13, July 10, 2019, effective
7/30/2019
43
CR 05, March 10, 2020, effective
3/30/2020
43
CR 19, October 10, 2020, effective
10/30/2020
