Kremper, Rita, and László Seres. “The Effect of Zinc Fertilization on the Yield and Element Content of Ryegrass”. Acta Agraria Debreceniensis, no. 38 (November 3, 2010): 27–31. Accessed November 24, 2024. https://ojs.lib.unideb.hu/actaagrar/article/view/2756.