摘要：This work aims to study the precision agriculture, seeking low-cost alternatives. Due to major environmental impacts that mismanagement cause to the soil, the definition of production areas using tools such as soil electrical conductivity sensors help perform faster analysis of some soil properties and assist in the decision to be taken to correct the ground. For the readings of the electrical resistance of the soil, the sensor used was a modified Octopus Soil Humidity, and the readings were obtained using a source of variable electric voltage and a digital multimeter. From the voltage and electric current readings of soil samples has been calculated the value of electrical resistance and correlations were also performed with the chemical properties of soil samples. The results showed that the highest linear correlation values with the electrical resistance of the soil were the soil properties calcium, magnesium and sum of bases.
