Barrios, M., Bozzo, A., Debelis, S., Pereyra, A. and Buján, A. (2006) “Soil physical properties and root activity in a soybean second crop/maize rotation under direct sowing and conventional tillage”, Spanish Journal of Agricultural Research, 4(4), pp. 355-362. doi: 10.5424/sjar/2006044-212.