1. Bliss FA (1981) HortScience 16, 129–132.
2. Bliss FA (1985) In Ludden PW and Burris JE, eds, Nitrogen Fixation and C02 Metabolism, pp. 303–310, Elsevier, New York.
3. Brim CA (1966) Crop Sci. 6, 220.
4. LaRue TA and Patterson TG (1981) Adv. Agron. 34, 15–38.
5. McFerson et al (1982) In Graham P and Harris S, eds, Biological