SOINNE, H., K. SAARIJÄRVI, and M. KARPPINEN. “Sensitivity of Soil Phosphorus Tests in Predicting the Potential Risk of Phosphorus Loss from Pasture Soil”. Agricultural and Food Science 17, no. 3 (January 3, 2008): 265-277. Accessed July 2, 2020. https://journal.fi/afs/article/view/5918.