Abstract
AbstractThe post-anthropogenic and soil cover transformations of former agricultural soils on the abandoned lands in the Russian Arctic territory are poorly investigated due to the active growth of the city complexes and increasing area occupied by agricultural lands. That is lead to an increase in the area of the arable lands surrounding the polar urbanized territories. Today, most of that land allocated for agricultural needs has been abandoned or affected by other types of land use. This study aimed to investigate the abandoned lands surrounding some of the settlements in the central part of the Yamal region. The soil diversity, morphology, and chemical and agrochemical properties were investigated with special reference to the specific transformations that occur to fallow lands under permafrost-affected cryogenic-ecosystem conditions. Analysis of data show that these soils are characterized by features relating to both, previous (and existing), anthropogenic impacts and natural processes such as cryogenic mass transfer. The degradation of the arable humus-enriched horizon was not as pronounced as it has been in more humid boreal environments over recent decades. The organic carbon content in topsoil depends on the land use and varied considerably among the soil types. The former arable topsoil horizon has been stable over time in terms of its morphological features and agrochemical state. Despite the high soil acidity levels, thenutrient content in the anthropogenically impacted soils was still high, even though being abandoned for 20 years.
Highlights
Research on the dynamics of agriculture land is important for improving the efficiency of agricultural infrastructure management and for achieving food safety and high economic growth
Comparing our data with other sources (Kabata-Pendias and Pendias 1989; Rebristaya and Khitun 1997), we found that nutrient elements (N, P, K) can persistently remain in soil for a long time, and when agricultural activities are resumed, abandoned soils can return to their previous forms
Based on the analysis of agrochemical properties and features of soil formation in Salekhard city and its surroundings it can be concluded that: – The predominance of sandy textured parent materials in the surroundings of the urbanized territories in the central Yamal region was the key reason why these locations and substrata were chosen for the organization of agricultural farms and related practices
Summary
Research on the dynamics of agriculture land is important for improving the efficiency of agricultural infrastructure management and for achieving food safety and high economic growth. It is important for identifying a model for transitioning to sustainable development and greening the agricultural sector in Russia. That is why former agricultural lands still exist in the surroundings of some polar cities. These soils can be evaluated in terms of their key properties, which can be used to frame new programs for Arctic development. The increasing rates of anthropogenic forces on both natural and urban ecosystems has led to the need to
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