Bougnom, Blaise Pascal, et al. “Green Waste Compost With Wood Ash Additive Improves Physico-Chemical and Biological Parameters of an Oxisol, and Soybean (Glycine Max L) Yield”. International Journal of Horticulture, Agriculture and Food Science, vol. 4, no. 2, Mar. 2020, https://journal-repository.com/index.php/ijhaf/article/view/1808.