Wulantika, Trisia, et al. “Enhancing Soil and Pakcoy (Brassica Rapa Subsp. Chinensis) Nutrient Content: Investigating the Effects of Chicken Manure Compost and Bioactivator Combinations on Various Doses”. Jurnal Ilmiah Pertanian, vol. 20, no. 3, Aug. 2023, pp. 271-80, https://doi.org/10.31849/jip.v20i3.12176.