Incluye referencias bibliográficas e índice. CONTENIDO: The cultivation, isolation and maintenance of rhizobia -- The qualitative characteristics of rhizobia -- Enumeration -- The assessment of nodulation and nitrogen fixation -- Assessment of the need for legume inoculation -- The production, control and use of legume inoculants -- Appendixes. Collections of rhizobia -- Determination of nitrogen -- The modified fahraeus slide technique -- A hand operated aseptic seeding device -- A reference-collection of legumes.
