Characterization of integrated sensor in physical soil parameter measurement device

Abstract

Soil is the most important thing required for farming activities. High-quality soil is needed for plants to grow well. Some of the parameters that indicate quality soil are the loose structure, pH 6.5-7.5, and salinity tolerance of 0-8000 μS/cm. The decline in soil quality in Indonesia due to pollution is one of the reasons that measurement soil quality device need to be developed. This study aims to characterize the soil pH sensor and conductivity sensor used in measuring soil quality parameters. The soil pH sensor is used as a pH detector, while the conductivity sensor is used as a salinity detector, as a control system the Arduino Uno is used. The results of sensor characterization show that the pH sensor has a sensitivity of-20,114 mV/pH and a maximum relative error of 2.16%, whereas, the conductivity sensor has a sensitivity of 0.0431 mVcm/μS and a maximum relative error of 6.78%. The results of measuring soil parameters of the five different soil samples, proves that the quality of the rice field's land and garden soil samples used in this research is still suitable for agricultural land.