Sampaio, Everardo V. S. B., et al. “Nutrient Cycling in Sugarcane. III. Nutrient Contents and Root Distribution in the Soil”. Pesquisa Agropecuaria Brasileira, vol. 22, no. 4, Apr. 2014, pp. 425-31, https://doi.org/10.1590/S1678-3921.pab1987.v22.14355.