Substrata, temperature, duration of test, and certain other specific directions for testing for germination and hard seed.

CFR · 2024-01-01 · US · Title 7

Specific germination requirements are set forth in table 2 to which the following paragraphs (a), (b), and (c) are applicable. (a) (2) (3) (4) (5) (6) (7) (8) (9) Paper substrata must be free of chemicals toxic to germinating seed and seedling growth. If root injury occurs from toxicity of a paper substratum or from the use of potassium nitrate, retests shall be made on soil or on a substratum moistened with water. (10) (11) (b) (2) (3) (4) (5) (6) (7) (i) For method 1, acid scarify 400 seeds for 10 minutes in concentrated sulfuric acid (95 to 98 percent H (ii) For method 2, plant 400 seeds on blotters moistened with a 0.2 percent solution of KNO (iii) Report the results of method 2 as the percentage germination. If the (8) (9) (10) (11) (12) (13) (c) (i) Coated seed units shall be placed on the substratum in the condition in which they are received without rinsing, soaking, or any other pretreatment. (ii) Coated seed units in mixtures which are color coded or can otherwise be separated by kinds shall be germinated as separate kinds without removing the coating material. (iii) Coated seed units in mixtures which cannot be separated by kinds without removing the coating material shall be de-coated and germinated as separate kinds. The coating material shall be removed in a manner that will not affect the germination capacity of the seeds. (2) The moisture level of the substratum is important. It may depend on the water-absorbing capacity of the coating material. A retest may b

official document · source cfr-2024 · id 7:§ 201.58