Keres, Indrek, Maarika Alaru, Viacheslav Eremeev, Liina Talgre, Anne Luik, and Evelin Loit. “Long-Term Effect of Farming Systems on the Yield of Crop Rotation and Soil Nutrient Content”. Agricultural and Food Science 29, no. 3 (June 25, 2020): 210–221. Accessed March 29, 2024. https://journal.fi/afs/article/view/85221.