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Rodrigues, M.A., Gomes, V., Dias, L.G., Pires, J., Aguiar, C. and Arrobas, M. 1. Evaluation of soil nitrogen availability by growing tufts of nitrophilic species in an intensively grazed biodiverse legume-rich pasture. Spanish Journal of Agricultural Research. 8, 4 (1), 1058-1067. DOI:https://doi.org/10.5424/sjar/2010084-1399.