Elonen, Paavo, Osmo Kara, and Leo Autio. “Sowing of Spring Cereals in Broad Bands and the Effect of Sowing Rate, Rolling and Irrigation on the Results”. Agricultural and Food Science 44, no. 3 (September 1, 1972): 127–137. Accessed May 18, 2024. https://journal.fi/afs/article/view/71818.