de Souza, L. C. F., Cruz, J. C., Ramalho, M. A. P., Salvador, N., & da Silva, J. B. (1996). Effect of harrowing before corn planting on weed control. Pesquisa Agropecuaria Brasileira, 31(11), 789–793. https://doi.org/10.1590/S1678-3921.pab1996.v31.4550