Rayyana, Rayyana, Ahmad Raksun, and M. Yamin. “The Effect of NPK Fertilizer and Tofu Dregs Organic Fertilizer on The Growth of Land Kale Plants (Ipomea Reptans Poir)”. Jurnal Biologi Tropis 23, no. 4 (September 1, 2023): 12–18. Accessed July 22, 2024. https://jurnalfkip.unram.ac.id/index.php/JBT/article/view/5503.