ANÁLISE DA HIDRODINÂMICA COM SENSORES CAPACITIVO E RESISTIVO DE ARDUINO EM SOLO DO CERRADO

Abstract

The use of sensors to determine the water content present in the soil is a process that gains space nowadays, with the automation of irrigation systems it became necessary to use electronic equipment to digitally determine parameters that are indispensable for making decision on irrigation management. In this context, the objective of this work was to analyze the application of two different types of sensors in cerrado soil. The experiment was carried out in the municipality of Ceres - Goiás. The soil was removed from an area where elephant grass cultivars were installed. Initially, a calibration was performed on the sensor data and the trend curve equation was found. The statistical design used was in randomized blocks in subdivided plots of 2x3 and in four blocks. Two types of treatments are considered, being the subplots, with three different depths being the plots and four repetitions. Capacitive sensors and resistive sensors were applied, applied at depths from 0 to 10, 10 to 20, and 20 to 30 centimeters, with four repetitions totaling 24 experimental plots. Soil moisture content was evaluated at 8 different times after the sample reached the field capacity. For the results found, analyzes of variance were performed by the tukey test, and for cases that showed significant differences, regression analyzes were applied to determine coherence in the trends of variations. It was found that the two sensors showed statistically to be reliable options for measuring soil moisture content, that the soil loses moisture differently when at varying depths and that the capacitive sensor was superior to the resistive only in terms of durability.