(1) Land, isolation, and field standards for hybrid sorghum seed certification are:
| | | | Field Standards |
| Land Standards Minimum Years (b) | Isolation Standards Minimum Feet | Pollen Shedding By Seed Parent Maximum At Any One Inspection | Other Varieties And/Or Off-Type (a) |
Definite | Doubtful |
Class | (**) | |
Foundation | 1 | | 990 | 1:3,000 | 1:50,000 | 1:20,000 |
Certified | 1 | | 660 | 1:1,500 | 1:20,000 | 1:1,000 |
(2) Seed standards for hybrid sorghum seed certification are:
| Off-Type Max. Seeds/lb. | Pure Seed Min. % | Inert Max. % | Other Crop Max. Seeds/lb. | Weed Max. % | Germination Min. % |
Class | |
Foundation | 2 | 98.00 | 2.00 | 2 | 0.10 | 85 |
Certified | 10 | 98.00 | 2.00 | 10 | 0.10 | 85 |
(**) | Pollinator Lines: B = Maintainer, R = Restorer |
(a) If off-type plants are found at the time of inspection, all seed heads within a radius of five feet of these plants must be removed from the field before the field is approved.
(b) Hybrid sorghum is not eligible for certification if planted on land that grew sorghum the previous year unless:
(i) The preceding sorghum crop is the same variety and is inspected and approved for the same or higher certification classification; or
(ii) The preceding sorghum crop is a variety which differs substantially in plant growth characteristics from the variety planted. However, grain type sorghum or sweet sorghum is not eligible for certification if planted on land that grew grass type sorghum the previous year.