JOAQUIN CAMILO TOLOLIU; REFGIUFI PATRIA AVRIANTO. DESIGN AND DEVELOPMENT OF AN IOT-BASED SOIL FERTILITY MONITORING SYSTEM USING A 7-IN-1 NPK SENSOR AND AI-BASED CROP PREDICTION MODEL. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), [S. l.], v. 5, n. 8, p. 4700–4708, 2026. Disponível em: https://ijset.org/index.php/ijset/article/view/1916. Acesso em: 5 jul. 2026.