Study of variation of Magnetic Field around a Palm Tree Using Smartphone Magnetometers: Influence of Height and Distance. East African Journal of Science, Technology and Innovation, [S. l.], v. 6, n. 3, 2025. DOI: 10.37425/7at0e893. Disponível em: https://mail.eajsti.org/index.php/EAJSTI/article/view/1027. Acesso em: 17 sep. 2025.