This master thesis addresses challenges of the determination of agricultural land use, based on the land production potential indicated by the soil productivity index, which is recorded in the land cadastre. In the theoretical part, legislation of protection of agricultural land, spatial planning and land cadastre in Slovenia are presented. They are crucial for understanding the implementation and use of the land productivity index for the determination of agricultural land use. The focus is on current “Agricultural Land Act”, which was introduced in 1996, with amendments, in particular the amendment from 2011, which has brought a new categorization of agricultural land with two categories: prime agricultural land conservation areas (TVKZ) and other agricultural areas (OKZ).
The thesis presents analytical studies of the soil productivity index in thirteen municipalities in Pomurje region in order to determine whether the soil productivity index of agricultural land is a suitable criterion for determining the areas of TVKZ and OKZ. For each municipality the average value of soil productivity index and distribution of agricultural land considering soil productivity index classes was determined. Furthermore, the analysis of the soil productivity index of agricultural land in drainage areas and in areas of permanent crops (plantations) was conducted, and the soil productivity index was analyzed considering the slope of the terrain. The thesis provides results of three versions of TVKZ and OKZ areas for all thirteen municipalities, which are than compared with the areas of the old agricultural land classification, i. e. with the best agricultural land (K1) and other agricultural land (K2). The results of our research confirmed the suitability of the soil productivity index for determining the areas of TVKZ and OKZ. However, it has been shown that the same limit value of the soil productivity index is not suitable to determine the areas of TVKZ in all municipalities that were included into our research. Thus, two new criteria were defined for determining areas of TKVZ: areas with irrigation systems and intensive orchard plantations. The thesis concludes that the determined areas of TVKZ and OKZ are geographically much more dispersed than the areas of K1 and K2. To ensure the homogeneity of the TVKZ and OKZ areas it is necessary to consider additional criteria: vineyard areas, drainage areas, land consolidation areas and the slope of the terrain.