NUGROHO, P. A. EVALUASI KESUBURAN TANAH PERKEBUNAN KARET DENGAN PENDEKATAN INDEKS HARA. Jurnal Penelitian Karet, [S. l.], v. 43, n. 2, 2025. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/1082. Acesso em: 2 jan. 2026.