Kuti, L., T. Tóth, and L. Pásztor and U. Fügedi. 1999. Relationship between the 
data of agrogeological maps and the extent of salt-affected soils on the Great 
Hungarian Plain. (Hung.) Agrokémia és Talajtan. 48:501-516

Based on agrogeological and soil maps on a 1:500 000 scale, the authors describe 
the geological conditions for the formation of salt affected soils in the Great
Hungarian Plain. Using the data of five maps (illustrating salt affected soils,
the groundwater level above sea level, the groundwater depth below the surface,
the soluble salt concentration of the groundwater and the dominant ions in the
groundwater), the authors outline the situations in which soil salinization and
sodification occur. A comparison of these maps revealed that the highest total
soluble salt concentration of the groundwater, which flows from boundaries and
higher territories to the middle of the Great Hungarian Plain, occurs in deeper
areas where the groundwater accumulates. In these areas the groundwater is
closest to the surface and is characterized by sodium. The map of salt affected
soils shows that salinization appears in these depressions where the groundwater
converges and cannot move further away. Its quantity decreases and its salt
concentration increases due to evaporation. It is here that the depth of the
groundwater is critical for salt accumulation.