Abstract
An assessment of the suitability of the arable land in the Dobrich region for its effective agricultural use has been prepared using an eight rate classification where the land valuation strategy guarantees the conservation of natural resources, with particular attention to erosion as a limiting factor. Maps of the area with Land Capability evaluation classes for effective agricultural and erosion control land use and the actual risk of water erosion have been developed.This allows the use of an integrated approach to the definition of soil protection measures - taking into account both soil constraints (labeled with subclass land) and the need for prevention against erosion processes. A set of different soil protection practices is recommended, each determined according to the specific soil, topographical and climatic features of the studied area, determined by the class and subclass of the land and depending on the degree of erosion risk and the way of land use (defined by Physical Blocks, 2016). The agronomic assessments according to the soil and climate conditions of the main agricultural crops are lnked to the detailed large-scale database created in the GIS format and the most suitable places for their cultivation on the territory of the Dobrich region have been identified. The agronomic fitness of arable land for the cultivation of wheat, maize, peaches and vines is assessed. Maps for the degree of their agronomic fitness were prepared. It is clear that almost all of the entire territory has a very good and good land for cultivation of these crops.
Highlights
In view of the great diversity of the soil cover of Bulgaria, and the great differences in altitude, we selected the 8-grades classification for the aims of this project. This classification is similar to that developed by USDA [9] and the Long-Term Erosion Control Programme in Bulgaria [3]
Two climatic influences interweave in the territory of Dobrich region – the continent of Europe and the Mediterranean from the southwest
The actual risk of erosion is determined within the class of land and soil losses are calculated according to the way of land use
Summary
Modern agriculture imposes various models of relative assessment of farmland – using and comparable to rapidly changing high technology. In view of the great diversity of the soil cover of Bulgaria, and the great differences in altitude, we selected the 8-grades classification for the aims of this project. This classification is similar to that developed by USDA [9] and the Long-Term Erosion Control Programme in Bulgaria [3]. This is the best way of taking into consideration the specific topographic, soil and climatic conditions of the country while the GIS methods enable better processing of the huge amount of information hold by the database developed so far. This classification is focusing on the requirements for soil protection from erosion
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