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2. 3) Association of Official Seed Analysts 1983. Seed vigor testing handbook: Contribution No.32 to the handbook on seed testing. 50-55.
3. 4) Bewley, J.D. and Black, M. 1994. Seeds: physiology of development and germination. Second edition. Plenum press, New York and London. 402-410.
4. 5) Chachalis, D. and Smith, M.L. 2000. Imbibition behavior of soybean (Glycine max (L.) Merrill) accessions with different testa characteristics. Seed Sci. Technol. 28: 321-331.