Martín-Lammerding, D., Tenorio, J.L., Albarrán, M.M., Zambrana, E. and Walter, I. 2013. Influence of tillage practices on soil biologically active organic matter content over a growing season under semiarid Mediterranean climate. Spanish Journal of Agricultural Research. 11, 1 (Feb. 2013), 232-243. DOI:https://doi.org/10.5424/sjar/2013111-3455.