Lignite-based Organic Fertilizer Improves Soil Quality and Yield of Rice in Belitang South Sumatera. j Trop. Soils [Internet]. 2019 Sep. 18 [cited 2025 Oct. 30];24(3):109-17. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/397