Assessment of the soil cover in the Irkutsk Region by cadastral value

Abstract

The article defines the specific indicators of the soil cadastral value for the agroclimatic subzones of agricultural landscapes in the Irkutsk Region. We calculate the cost of the soils most common in the region, which are present in the scales of land classification and in the Unified State Register of Soil Resources of Russia. For the first time for the Irkutsk Region, we assess the quality of agricultural land rather by soil types, taking into account the area of a land plot, standard yield, and technological (standard) costs, than by soil differences. Soils in the land-assessment zones are represented according to the USSR soil classification system of 1977 and the international WRB system. Average values of the specific indicator of the cadastral cost of lands are within 0.1 RUB/m2 in typical sod podzolic soils (Albic Folic Luvisols (Cutanic, Different)); they reach 0.3 rubles/m2 in sod alluvial saturated layered soils (Mollic Fluvisols (Orthofluvic Amphifluvic)) and 3.1 rubles/km2 in leached chernozems (Umbric Calcic Luvic Phaeozems) as well as 3.3 rubles/m2 in meadow chernozems (Chernic Phaeozems (Endocalcic)) and in sod alluvial saturated soils (Mollic Fluvisols). Low indicators of the cadastral cost of agricultural land are due to low values of agroclimatic potential, low humus content in these soils and low thickness of humus horizon. We indicate the sensitivity of the method for calculating the cadastral cost of lands (2017) to different soils and geographical conditions.