Montanari, R. et al. 2005. Landscape form as a criterion for sampling optimization of an oxisol under cultivation of sugar cane. Pesquisa Agropecuaria Brasileira. 40, 1 (Jan. 2005), 69–77. DOI:https://doi.org/10.1590/S1678-3921.pab2005.v40.6923.