Effectiveness application of fertilizer on maize: The case study of maize farmers in West Pasaman RegencyJamilah Munir, Syahrial Syahrial, Yulia Rahmawati, Lam Hasmi and Willem RelmayeniE3S Web of Conf., 373 (2023) 03011DOI: https://doi.org/10.1051/e3sconf/202337303011