Nodulation, Legume researchers, Fabaceae, Pablo Lozano, Fourth International Legume Conference 2001, IV Reunión Satélite de Especialistas en Fabáceas 1998, Leguminosae, Legume systematics, Nitrogen fixation, VII Congreso Latinoamericano de Botánica 1998, Rupert Barneby Award 1998, and Legumes