This volume collects 65 lectures and 87 posters, which comprise an up-to-date account of the state of knowledge on biological nitrogen fixation with non-legumes, addressing topics related to free living diazotrophs, root-associated diazotrophs, nitrogen-fixing photosynthentic microorganisms, and dia

The Fifth International Symposium on Nitrogen Fixation with Non-legumes was held in Florence (Italy) on 10-14 September, 1990. Earlier Symposia of this series were held in Piracicaba (Brazil), Banf Alberta (Canada), Helsinki (Finland) and Rio De Janeiro (Brazil). The Symposium's main objectives were to bring together scientists working in many different fields of nitrogen fixation, to stimulate discussion on this important process and to have an appraisal of the most recent studies concerning nitrogen fixation with non-legumes. The Symposium was attended by 230 scientists from 32 different...