CHANGES IN THE CROPLAND AREAS OVER 250 YEARS (CASE STUDY A KEY PLOT IN THE MOSCOW REGION)

Abstract

Based on data from old and modern maps and satellite images we reconstructed the arable land borders within a key plot (100 km2) in the Moscow region for 8 time periods, from the General Land Survey (1767) to the present day. Brief descriptions for the special geometric plans of the Bogorodsk, Dmitrov and Moscow districts (“uyezd”) of the Moscow province (“guberniya”) were analyzed for accurately describing the land use displayed on the General Land Survey plans. The contours of arable lands on the general land survey plans (1767) of the studied area refer to those under constant cultivation, while periodically abandoned land were described and measured separately. The dynamics of arable land borders for the studied period was analyzed using the scheme of landscape zoning, and data on the lithological and geomorphologic structure of the territory and morphometric characteristics of its relief. The prevailing slope gradients and the area of arable lands are identified for each time period. The maximum percentage of arable land under constant cultivation (42%) is characteristic for the end of the 18th century; the minimum (8%) is in evidence at the present time. It was found that the proximity to settlements and the degree of soil drainage were the principal factors determining the spatial structure of arable lands.