Lança Rodrígues, J., Gamero, C., Costa Fernándes, J. and Mirás-Avalos, J. 2009. Effects of different soil tillage systems and coverages on soybean crop in the Botucatu Region in Brazil. Spanish Journal of Agricultural Research. 7, 1 (Mar. 2009), 173-180. DOI:https://doi.org/10.5424/sjar/2009071-409.