Yagi, Renato. “Occasional Soil Tillage, Liming, and Nitrogen Fertilization on Long-Term No-Tillage System”. Pesquisa Agropecuaria Brasileira, vol. 53, no. 7, Oct. 2018, pp. 833-9, doi:10.1590/S1678-3921.pab2018.v53.25705.