1. Insecticides and heavy metals effects on free-living rhizobia and nitrogen fixation by alfalfa inoculated with Rhizobium meliloti;Aouani;Microbiologie Aliments Nutrition,1992
2. Cultivar-specific interaction of soybean with Rhizobium fredii are regulated by the genotype of the root;Balatti;Plant Physiology,1990
3. Nitrogen fixation (C2H2) reduction by Medicago nodules and bacteroids under sodium chloride stress;Bekki;Physiologia Plantarum,1987
4. Beck D. P., Materon L. A. and Afandi F. (1993) Practical Rhizobium — Legume Technology Manual. In Technical Manual No. 19. International Center for Agricultural Research in the Dry Areas, Aleppo, Syria
5. Bremner J. M. (1965) Total nitrogen. In Methods of Soil Analysis Part 2, eds C. A. Black, D. D. Evans, J. L. White, L. E. Ensminger and F. E. Clark, pp. 1149–1179. American Society of Agronomy, Madison