Ekholm, Petri, Pasi Valkama, Elina Jaakkola, Mikko Kiirikki, Kirsti Lahti, and Liisa Pietola. “Gypsum Amendment of Soils Reduces Phosphorus Losses in an Agricultural Catchment”. Agricultural and Food Science 21, no. 3 (September 28, 2012): 279–291. Accessed April 19, 2024. https://journal.fi/afs/article/view/6831.