Silva, Rosemeire Helena da, and Ciro Antonio Rosolem. “Soybean Root Growth As Affected by Previous Crop and Soil Compaction”. Pesquisa Agropecuaria Brasileira, vol. 37, no. 6, June 2002, pp. 855-60, doi:10.1590/S1678-3921.pab2002.v37.6411.