Prevedello, C.L. et al. 1994. Unit gradient of the hydraulic potential as a source of error in obtaining the hydraulic conductivity of an unsaturated soil. Pesquisa Agropecuaria Brasileira. 29, 2 (Feb. 1994), 275–280. DOI:https://doi.org/10.1590/S1678-3921.pab1994.v29.4053.