The Vietnamese Mekong Delta (VMD) is one of the agricultural production areas mostly affected by salinization. However, the majority of research topics related to soil electrical conductivity (Soil EC) used mostly soil sampling and laboratory analysis methods or imported equipment, which is costly and time-consuming. The purpose of this study is to measure soil EC using the apparent resistivity method. To compare the obtained values, the Wenner electrode system is used with distances of 5, 10, and 30 cm. The obtained results are compared with the results obtained from the Soil EC Hanna HI98331 device on wet rice farms when the soil was dried after sowing. The study found that when the electrode distance was 5 cm and the electrode depth was between 2.5 and 5 cm, the soil EC values obtained in the water environment had a strong correlation (R=0.9992, RMSE=0.0087) with those from the Hanna HI98331 device. When the electrode depth was less than 2.5 cm in the soil environment, and the electrode distance was still 5 cm, the correlation was still good (R=0.85, RMSE=0.0053). However, when the electrode distance was increased to 10 cm, the EC was averaged at a depth of 10 cm, resulting in a lower correlation (R=0.46, RMSE=0.027), and the correlation (R=0.49, RMSE=0.075) when the electrode distance was 30 cm.