Field standards

1. A portion of the field may be accepted for certification if the boundary is well defined. 2. Fields should be rogued before blooming and before inspection is made to remove other species, off-type plants, and weeds, the seeds of which are difficult to separate in cleaning. 3. A seed field to be eligible for the production of foundation, registered, or 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 Required (Feet) Type Foundation Registered Certified All cross-pollinated species C 1,320 660 330 Entirely apomictic strains A 165 165 82.5 Highly self-fertile species S 165 165 82.5 4. Specific requirements. The maximum field tolerance for other varieties and off-type plants of the same species, when recognized, shall be as follows: Foundation 0.1 percent Registered 0.5 percent Certified 1.0 percent