Gerasimova, Iliyana, Vaniya Lozanova, Irena Atanassova, and Zdravka Petkova. 2024. “Comparative Analysis of Archival Data on Yields of Main Field Crops from Fertilizer Experiments on Different Soil Types in Bulgaria”. Bulgarian Journal of Crop Science 61 (1): 75-86. https://doi.org/10.61308/CPCB1076.