Abstract
At present, the return of fallow lands to agricultural circulation is an important and one of the topical issues of the whole world. Research related to the restoration of soil properties of fallows is of particular value. Therefore, it is necessary to know what processes occur in the vegetation and soil cover of fallows at the different stages of their development, taking into account local natural features. The paper presents the results of a survey of young (up to four years) and middle-aged (up to ten years) fallows of the forest-steppe zone of Western Siberia within the Novosibirsk region. It is established that in the first decade of succession in fallow areas there are two stages of overgrowth, and when analyzing the structure of plant matter, it is shown that the ratio of their fractional composition reflects the general tendency to restore the ecosystem that preceded plowing. Restoration of soil properties under young and middle-aged fallows is much slower. Data of humus content analysis allow us to conclude that its content is somewhat higher in the upper parts of the profile in middle-aged fallows compared to young fallows. The research on soil-physical characteristics and vegetation cover allowed us to note the trends of restoration of the initial state of soils.
Highlights
The process of cultivation of the soil is accompanied by the process of removing parts of agricultural land from circulation
Abandonment of agricultural land is common in Europe, especially in postsocialistic countries [4] and the returnig of the fallows into agricultural use is very appropriate for the effective use of agricultural land
The process of returning fallows into the active agricultural use may lead to imbalance between the processes of humification and mineralization which is the cause of the loss of the organic matter and the infringing of the biological interchange of the matter [7]
Summary
The process of cultivation of the soil is accompanied by the process of removing parts of agricultural land from circulation (by transferring them to the fallows). Such lands are of interest, because they are the economic and environmental reserves of Russia and the whole world [1,2,3]. There is a process in which, during a long use of the soil as the crops, the ecosystem changes significantly. When the arable land turns into the fallow land and in the reverse process of returning fallows into the arable lands it is necessary to take into account the whole range of regional characteristics of the territory
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