SOUTH DAKOTA SEED CERTIFICATION STANDARDS
Buckwheat
Seed Certification Standards
(In Addition to the General Standards Listed on the Standard's
Home Page )
I. Land Requirements
A crop of buckwheat will not be eligible for certification if planted on land on which the
same kind of crop was grown the year previous unless
the previous crop was grown from Certified seed of the same variety.
II. Field Inspection
A. All field inspections of buckwheat will be made in the bloom stage.
B. A field harvested before inspection is made will not be eligible for certification.
III. Field Standards
A. Isolation
1. At the time of inspection, the field must be separated from fields of other crop kinds
by a fence row, natural boundaries or by a strip at least ten feet wide which is either
mowed, uncropped or planted to some other separable crop.
2. When it is necessary to remove a strip to obtain proper isolation, a part of the strip
to be removed must be cut into the field to be inspected.
3. All buckwheat fields producing Certified seed must be isolated by at least 660 feet
from buckwheat fields of any other variety or fields of the same variety that do not meet
the varietal purity requirements for certification.
B. Roguing
1. All roguing must be done before field inspection is made. Rogued plants must not be
left in the field to be harvested.
2. Patches of prohibited weeds must be either removed by cutting or must be controlled by
other means so that no seed is produced.
C. Specific Requirements
Maximum Tolerance |
|||
| Factor | Foundation | Registered | Certified |
| Other varieties* | 1:10,000 | 1:5,000 | 1:2,000 |
| Inseparable other crop seed | 1:10,000 | 1:7,500 | 1:5,000 |
| Prohibited weeds** | None | None | None |
* Other varieties shall be considered to include plants that can be differentiated from
the variety that is being inspected. However, other varieties shall not
include variations which are characteristic of the variety.
** Includes only field bindweed, leafy spurge and Russian knapweed. The tolerance for
other prohibited weeds in the field will be determined by the inspector on the basis of
stages of development of both the crop and the weed.
IV. Seed Standards
| Factor | Foundation | Registered | Certified |
| Pure seed (minimum) | 99.00% | 99.00% | 99.00% |
| Total weed seed (maximum) | .05% | .05% | .10% |
| Other varieties* | .01% | .01% | .01% |
| Other crop seed (maximum) | 1 per 2 lbs | 1 per lb. | 3 per lb. |
| Inert matter (maximum)** | 1.00% | 1.00% | 1.00% |
| Prohibited noxious weed seed | None | None | None |
| Restricted noxious weed seed (maximum)*** | 1 per 4 lbs | 1 per 2 lbs. | 2 per lb. |
| Germination | 85.00% | 85.00% | 85.00% |
| Moisture (maximum)**** | 14.00% | 14.00% | 14.00% |
* Other varieties shall not include variations which are characteristic of the variety.
** Foreign matter other than broken seed shall not exceed 0.2%.
*** See restricted noxious weeds--Number 23 on Standard's Home
Page. Restricted noxious weed seed and rate of occurrence must be listed on the
analysis label.
**** Effective through December 31.