1. Abbas, M. Tawfik. 1995. “Integration of biological N2‐fixing systems to build up biological fertility of desert soils”. Giza, Egypt: Fac. Agric, Cairo Univ. M.Sc. Thesis
2. Abo‐Taleb, H. Y. 1991. “The effect of inoculation with specific rhizobia on N2‐fixation, nodulation and yield of beans (soybeans)”. Egypt: Fac. Agric, Cairo Univ. M. Sc. Thesis
3. Abo‐Taleb, H. Y. 1998. “Intercropping of legumes and non‐legumes as an approach to maximize input of biological N2‐fixation in plant‐soil system”. Giza, Egypt: Fac. Agric, Cairo Univ. Ph. D. Thesis
4. Fixation and Excretion of Nitrogen by Tropical Legumes
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