KARTINI, Kartini; RAMADHAN, Tris Haris; SASLI, Iwan. Improving the Productivity of Hybrid Maize through Soil Ameliorant and NPK Fertilizer Applications on Ultisols: Peningkatan Produktivitas Jagung Hibrida melalui Pengaplikasian Amelioran dan Pupuk NPK pada Tanah Ultisol. Agrifarm: Jurnal Ilmu Pertanian, [S. l.], v. 14, n. 2, p. 70–77, 2025. DOI: 10.24903/ajip.v14i2.3726. Disponível em: https://ojs.uwgms.ac.id/index.php/agrifarm/article/view/3726. Acesso em: 25 apr. 2026.