Miranda, A. R. L., Nunes, L. A. P. L., Oliveira, M. L. J., Melo, W. J., & Araujo, A. S. F. (2014). Short communication. Growth and nodulation of cowpea after 5 years of consecutive composted tannery sludge amendment. Spanish Journal of Agricultural Research, 12(4), 1175-1179. https://doi.org/10.5424/sjar/2014124-6282