s:785:"TI Benefiting from N2 -fixation and managing rhizobia 
AU Mafongoya, P.L. 
AU Giller, K.E. 
AU Odee, D. 
AU Gathumbi, S.M. 
AU Ndufa, S.K. 
AU Sitompul, S.M. 
AB Nodulation and nitrogen fixation in the Leguminosae (Fabaceae) family classification of rhizobia and quantification of N2 fixed by different legumes are reviewed. Some promising management options intended to improve N2-fixation by direct selection of rhizobia in soil or by screening and breeding of legumes for increased N2-fixation are discussed. The effects of pruning soil phosphorus and pH available nitrogen and interactions of nematodes and rhizobia on nodulation and N2-fixation are analysed. The fate of fixed nitrogen can be determined by the recovery efficiency of N and leaching and gaseous N losses. 
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