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The soil is one of the most complex natural systems of Earth. By its features, the soil reflects the impact of clime, flora, fauna, human activity and topography on bedrock from which the soil was formed during various periods of time, being considered an indicator of environment evolution. The soil degradation means the quantitative and qualitative diminishing of the current potential yielding capacity of soil that contributes to the production of goods and services as a result of some unfavorable evolution, by d...

The study of the relief transformations caused by human activities is one of the most important problems of modern geomorphological studies. The study of the anthropogenic impact on the nature and relief in particular and forecast of changes is particularly important in solving the problems of the economics and sustainable development of the country what is to be considered in complex with the problems of environmental protection and rational use of natural resources. The human activities during the underground mi...

Chernozem soil-type forms 11% of the agricultural land fund in the Czech Republic. It is located in the driest and warmest regions of the Czech Republic. It occurs up to an altitude of 300 m a. s. l. with an average annual temperature of 8 °C and an annual precipitation of 450 - 650 mm. The very thick humus horizon was formed by the accumulation of humus under the steppe or forest-steppe vegetation. In the Czech Republic, such land is exclusively used for agricultural purposes. Therefore, its character of steppe s...

The article deals with the degradation of cement beams containing polypropylene and polyvinyl alcohol fibres. Nowadays it is developed high-quality concrete that contains a minimum of reinforcement or all it is replace by micro fibres. Microscopic examination of fiber breakage and changes at fiber-matrix interface was investigated in this paper. The cement beams were stored in an aggressive environment of 3% NaCl, 5% NaOH and 5% H2SO4 for 28 days (CSN P CEN / TS 12390-11). Mechanical parameters and changes of fibr...