Soil pH and Nutrient Analyzer for Selecting Suitable Economic Crops
DOI:
https://doi.org/10.14456/rmutlengj.2024.12Keywords:
Economic Crops, Soil pH analyser, Soil NPK analyserAbstract
This paper focuses on developing a soil pH and nutrient analyzer prototype designed to aid in the selection of economically viable crops in Thailand. The analysis includes assessing soil pH and the primary nutrients (NPK) to evaluate the soil quality for the cultivation of economically important crops in Thailand. These economic crops consist of rice, cassava, sugarcane, rubber, and palm oil. This analyzer aims to provide farmers with tools that enhance efficiency in cultivation, specifically in soil preparation before planting or selecting crops that are suitable for the specific soil conditions in the area. The soil pH and NPK sensors that have undergone preliminary accuracy calibration are utilized for soil quality assessment. The measured results of sensors are sent to a microcontroller for analysis of soil pH and NPK values to determine their suitability for cultivating economically important crops in Thailand, including rice, cassava, sugarcane, rubber, and palm oil. A pH buffer solution and NPK colorimetric test strips are used for preliminary calibration of the sensors measuring pH and NPK, respectively. The preliminary calibration results indicated that the average error for pH calibration was 9.48%. For the calibration of soil NPK, the average values for nitrogen (N), phosphorus (P), and potassium (K) were 162.4 mg/kg, 66 mg/kg, and 60.6 mg/kg, respectively. These values were within the range of the pH buffer solution kit and the NPK colorimetric test strip. The soil pH and NPK values obtained from the measurements were analyzed the suitability of the soil for cultivating the five economically important crops. Consequently, farmers can conveniently prepare the soil before planting or select suitable crops for specific soil conditions using the proposed soil pH and nutrient analyzer. This analyzer tool enhances the efficiency of Thai farmers in cultivation.
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