Qori Hafizah, Hamidah Hanum, and Mohd. Madjid B. Damanik. “Providing Azolla and Goat Manure to Increase Nutrient N and Growth of Lowland Rice (Oryza Sativa L.)”. Jurnal Online Pertanian Tropik 7, no. 1 (April 5, 2020): 40–46. Accessed August 4, 2025. https://idjpcr.usu.ac.id/jpt/article/view/3597.