SOUTH DAKOTA SEED CERTIFICATION STANDARDS
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SOUTH DAKOTA SEED CERTIFICATION STANDARDS |
Grass
Seed Certification Standards
(In Addition to the General Standards Listed on the Standard's
Home Page )
I. Land Requirements
A. A field to be eligible for the production of Foundation seed must not have grown or
been seeded to the same species during the previous five years.
B. A field to be eligible for the production of Registered or Certified seed must not have grown or been seeded to the same species during the previous year unless the crop was a Certified class of the same variety.
C. When not specified by the developer or owner of a variety, the certifying agency will determine the length of time the fields will be eligible for certification.
D. Fields must be rogued prior to harvest to remove off-type plants and other grasses or weeds, the seeds of which cannot be separated by mechanical equipment. Rogued material must be removed from the field if it is sufficiently mature to cause contamination. Exceptionally weedy areas should be removed prior to harvest.
II. Field Inspection
A. A field inspection must be made each year that a class of Certified seed is to be
harvested from the field.
B. The field will be inspected after the crop is fully headed but before it is cut. The seed from fields harvested before an inspection is made is automatically ineligible for that year.
III. Field Standards
A. The seed field is the unit for certification. A portion of a field may be accepted for
certification if the boundary is well defined. A fence or a strip of ground at least five
feet wide which is mowed, uncropped or planted to some crop other than the kind in
question constitutes a field boundary.
B. Isolation
A grass seed field to be eligible for the production of one of the classes of Certified
seed must be isolated from any other strain or strains of the same species in bloom at the
same time in accordance with the requirements given in the following table:
MINIMUM ISOLATION DISTANCE*
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| Symbol | Foundation | Registered | Certified | **Border to be Removed | |
| All cross-pollinated species | C |
900 | 300 | 165 | 0 |
| 600 | 225 | 100 | 9 | ||
| 450 | 150 | 75 | 15 | ||
| Strains entirely apomictic | A |
60 | 30 | 15 | 0 |
| 30 | 15 | 15 | 9 | ||
| Highly self-fertile species | S | 60 | 30 | 15 | 0 |
| 30 | 15 | 15 | 9 | ||
* Isolation between classes of the same variety may be reduced to 25% of the distance
otherwise required.
** Area in feet to be removed from border of field after flowering and not used for seed.
(Applies only to fields five acres or more).
When it is necessary to remove a strip to provide isolation, this strip may be:
1. Mowed in the contaminating field if it is done before the plants in the seed producing
field start blooming.
2. Mowed in the field to be Certified if done after the plants in the seed producing field
have bloomed.
C. Specific Requirements--Field Standards
| Foundation | Registered | Certified | |
| Other varieties and off-type plants | 0.1% (1:1000) | 1.0% (1:100) | 2.0% (1:50) |
| Prohibited noxious weed seed | None | None | None |
| Other crop plants | 0.1% (1:1000) | 0.5% (1:200) | 0.5% (1:200) |
IV. Seed Standards
Refer below for specific seed standards for the non-chaffy grass seed species.
No Prohibited Weed Seed is allowed in any class. (Refer to Number 23 on the
Standard's Home Page)
| Foundation | Certified | |
| Other varieties (maximum) | .10% | 1.00% |
| MINIMUM | MAXIMUM | |||||||||||||||
| Species | Type of Reproduction | Percent Pure Seed | Percent
Germination All Classes *** |
Percent Other Crop | Percent Other Grass | Percent Inert Matter | Restricted
Weed Seeds ** |
Percent Total Weed Seed | Percent Annual Brome* | |||||||
| F & R | C | F & R | C | F & R | C | F & R | C | F & R | C | F & R | C | F & R | C | |||
| Bromegrass | C | 90 | 85 | 80% | 1.0 | 1.0 | 0.1 | 2.0 | 10 | 15 | 9/lb. | 45/lb. | .25 | 1.0 | .15 | 0.5 |
| Crested Wheatgrass | C | 90 | 90 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Pubescent Wheatgrass | C | 90 | 90 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Slender Wheatgrass | S | 90 | 90 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Intermediate Wheatgrass | C | 90 | 90 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Tall Wheatgrass | C | 90 | 90 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Western Wheatgrass | C | 85 | 85 | 60% | 0.2 | 1.0 | 0.1 | 2.0 | 15 | 15 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Russian Wildrye | C | 90 | 90 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Creeping Foxtail | C | 75 | 70 | 80% | 0.2 | 1.0 | 0.1 | 2.0 | 20 | 20 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Reed Canarygrass | C | 95 | 90 | 75% | 0.2 | 1.0 | 0.1 | 2.0 | 5 | 10 | 9/lb. | 45/lb. | .25 | .5 | .15 | 0.5 |
| Switchgrass | C | 90 | 90 | 50% | 0.2 | 1.0 | 0.1 | 2.0 | 10 | 10 | 9/lb. | 45/lb. | .25 | 1.0 | .15 | 0.5 |
| * Japanese chess, hairy chess, downy brome, cheat ** Refer to Number 23 on the Standard's Home Page *** Germination % equals normal germination plus dormant seed Chaffy Grass Seed Species Field and Seed Certification Standards for the chaffy grasses* will be governed by standards established by the Association of Official Seed Certifying Agencies (AOSCA). Copies of specific standards are available from the Certification office to individual applicants upon request. * Bluestem (Andropogan spp.); buffalograss (Buchloe spp.); grama(Bouteloua spp.); and Indiangrass (Sorghastrum nutans).
Web page last modified on March 06, 2000 by Kay Ruden. |