Epiphytic Cyanobacteria on Chara vulgaris Are the Main Contributors to N2 Fixation in Rice Fields - Carreres Ortells, Ramón; Leganés Nieto, Francisco; Aburto, Juan; Carrasco Gata, David; Fernández Valiente, Eduardo; Ariosa Morejón, Yoanna; Quesada, Antonio (Applied And Environmental Microbiology, 2004)