Pola Sebaran Retensi dan Ketersediaan Hara pada Toposekuen Lahan Jagung di Desa Pilolaheya, Kabupaten Bone Bolango: Distribution Patterns of Retention and Nutrition Availability at Maize Land Toposequens in Pilolaheya Village, Bone Bolango Regency. Jurnal Ecosolum, v. 11, n. 1, p. 1–13, 13 Jun.2022.