REVIEW ON RENEWABLE ENERGY-BASED SMART FERTIGATION CONTROLLER USING NPK SENSOR. International Journal of Mechanical Engineering Research and Technology , [S. l.], v. 18, n. 4, p. 126–162, 2026. Disponível em: https://ijmert.com/index.php/ijmert/article/view/302. Acesso em: 10 oct. 2026.