Hakim, Nurhajati, Agustian ., and Yanti Mala. “Application of Organic Fertilizer Tithonia Plus to Control Iron Toxicity and Reduce Commercial Fertilizer Application on New Paddy Field”. JOURNAL OF TROPICAL SOILS 17, no. 2 (November 19, 2012): 135–142. Accessed August 1, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/144.