Saarnio, Sanna, and Riitta Kettunen. “Biochar Addition Affected Nutrient Leaching and Litter Decomposition Rates in Boreal Sandy Soils”. Agricultural and Food Science 29, no. 4 (September 25, 2020): 287–296. Accessed March 29, 2024. https://journal.fi/afs/article/view/89559.