TY - GENERIC DO - 10.20944/preprints202403.1520.v1 UR - http://dx.doi.org/10.20944/preprints202403.1520.v1 TI - Using Optical Sensor Applied to Rapid Soil Test Kit for NH4+ and NO3- in Soil T2 - Preprints AU - Jaisin, Chawaroj AU - Aumtong, Suphathida AU - Chotamonsak, Charkit PY - 2024 DA - 2024/03/26 PB - Preprints