In the first year of resolving, 9 sites with characteristic soils for long-term sampling and analysis of the soil horizon were selected on the basis of preliminary probe mapping. From these probes, samples of the soil were taken and analyzed seven times (once in 2011 and twice between 2012-2014). The sampling and the sample analysis followed the methodology described in Chapter 2.1 of this report. All the results achieved are presented in the project milestones from between 2011-2014 [6] . After four years of research, a very slow improvement of the chemical-pedologic soil parameters in the sampling probes (especially the content of the acceptable nutrients, partly even humus, absorption, total nitrogen) can be noted. No deterioration of the soil quality was found in any quantity. However, for a totally unambiguous conclusion on the evolution of the soil horizon, the observation period of 4 years is rather short. The results of the entry and the final sampling are given in Table 1 and Table 2.

Coordinates of the reconnaissance probes:

S1 (X-986 620, Y-791225), S2 (X-985 490, Y-791 290), S3 (X-984 865, Y-790 805), S4 (X-986 992, Y-790 505), S5 (X-986 554, Y-789 715), S6 (X-984 915, Y-789 715), S7 (X-984 685, Y-789 725), S8 (X-984 905, Y-785 195), S9 (X-985 210, Y-789 195).

After the first stage of the pedological and botanical mapping was completed, researchers were consulted and 11 botanically interesting sites were selected where the soil probes were excavated and samples were taken for a pedological

S1―brown clay, S2―brown clay, S3―brown clay, S4―gray clay, S5―gray clay with coal matter, S6―phonolite gravel, S7―kaolinically weathered phonolite, S8―brown clay, S9―brown clay.

analysis using the methodology described in Chapter 2.1. Most fieldwork and laboratory work took place between the years 2012-2013 [7] . Details of botanical habitats, the rationale for selecting them and the location of the individual habitats are given in the botanical results of the project solution. The latest results obtained and the very brief properties of the habitats are given in Table 3 below.

S1―brown clay, S2―brown clay, S3―brown clay, S4―gray clay, S5―gray clay with coal matter, S6―phonolite gravel, S7―kaolinically weathered phonolite, S8―brown clay, S9―brown clay.

Site 1―behind the gatehouse of the company, the initial succession stage; Site 2―reed slopel; Site 3―phytotoxic area over pond 1; Site 4―Pond shore 1; Site 5―Pond shore 2; Site 5b―Pond shore no. 3; Site 6―under the Celio, above the road. Soggy salt lake with a characteristic flora; Site 7―under the Celio, above the road. Dry salt lake with characteristic flora; Site 8―the slopes of Kočičí vrch; Site 9―the slopes of Kočičí vrch; Site 10―Pařidelský lalok (the area with an application of organic matter from Štětí).

In this case, a very slight improvement of the soil properties can be observed in the areas with brown clay (including the “wet” salt lake), partly in the Kočičí vrch area. However, it is only an indicative assessment, only 2 samples were taken within the horizon of only 2 years. The mineralogical composition has not changed since 2012, the presence of gypsum in probes 6 and 7 (salt lake vegetation) was confirmed. The results served as a basis for the botanical assessment of the area.

This important part of the project was carried out between the years 2012 and 2014. In the period between 2012-2013, sampling was carried out twice from 9 permanent site sampling probes and once of 15 small phytotoxic and sterile areas (see sub-reports from between 2012-2013). In 2014, an additional sampling of the selected typical phytotoxic and sterile surfaces took place. To preserve the continuity of the research, the methodology for the evaluation of the sediment of the Most basin which has been used since the 1990s (the determination of 2 mol/l HNO₃ with the method of atomic absorption spectrometry) was maintained. The contents of the hazardous trace elements As, Be, Cd, Co, Cr, Cu, Mo, Ni, Pb, V, Zn, Hg were compared with the background limits required for belonging to the agricultural land fund according to regulation 13/1994 Coll. The Limiting values of risk elements for forest soils are not set for conditions of the Czech Republic. The methodology of the laboratory analysis was guided by the relevant internal methodological procedure of the testing laboratory [8] . In addition, the results obtained in the area of lake Most were compared with the results obtained from the research of the old reclaimed dump in the Most basin [9] and with the results of the analyses of growing soils without anthropogenic influences (drilling the core near the Ore Mountains) [10] . The situation of the relatively most problematic areas of the lake Most area is shown in Table 4.

The most favorable results were obtained on the relatively young reclamations of the slope and shores of Lake Most where the contamination with hazardous trace elements is virtually not a problem. This is due to the relatively recent reclamation (the transfer from the atmosphere has been minimal), not using bentonites in the reclamation work and the relatively low geological background. The influence of the application of organic matter in the 1990s has not been proven. Slightly increased As content was found only in some small phytotoxic areas. Hazardous trace element contents are higher in phytotoxic soil than in the baseline sampling probes. A significant difference was found between the phytotoxic areas with coal matter and the sterile surfaces with increased siderite content. Increased levels of hazardous trace elements in coal-bearing soils are likely to cause the presence of iron sulfides and the products of their disintegration. No dangerous contents of the trace element were detected in any sample. In the case of the old reclaimed dumps, the problem of the soil profile reclaimed for agricultural purposes in some areas is only a very limited As content. Certain anomalies

in the above-limit content of some of the risk elements (Co, Cr, Cu, Ni, V) in anthropo soil reclaimed for forestry purposes appear on the soils of reclaimed bentonites. On the non-layered soils of the coal seam, the As content increases locally. Due to the age of the reclamation, the transfer of toxic substances arising from the combustion of coal from the atmosphere into the pedosphere is significantly affected. In the case of the large overlying soil from a borehole near the Ore Mountains, the detected contents are below the limit values and exceed them only in isolated cases. Somewhat elevated is the As content, especially at a depth of up to 50 m. The only source of the contamination is the natural geological setting.

The mapping work was carried out throughout the entire task resolution, being the most important part of the pedological problem. The main result of the first phase of the work was dividing the shores and slopes of Lake Most into three main pedologic areas.

The First area (approximately 80% of the bank) forms kaolinitic-illitic brown clays suitable for reclamation. This is mostly the original soil; the western slopes are formed partly from the soil of the Střimice dump. Very small areas without vegetation appear locally in the area (their occurrence has been mapped). The cause is usually the occurrence of phytotoxic acidic soils of coal seams or less often, the occurrence of hard, siderites of enriched soils.

The second area (about 5% of the bank) consists of former mining aggregate (phonolite). It is made up of various eroded whitish phonolites, from practically solid gravel to kaolinically weathered soil. Reclaiming these soils is completely inappropriate; from the point of view of the landscape, the former quarry is an interesting phenomenon, which is recommended to leave a managed succession.

The third area (approximately 15% of the shore) is formed by the steep slopes of the Pařidelský Lobe. The soils here are similar to those of area 1 with the reclamation-appropriate kaolinite-illitic clays. However, due to the danger of erosion and landslides, organic materials from the former Štětí mill (decay bark and cellulosic sludge) were applied in the past as part of the technical reclamation [11] .

In the first area, 5 long probes were dug, with 2 in the second probe region and 2 more probes in the third probe region. The probes were used to collect and analyze soil samples to monitor the changes in the soil horizon development (see Chapter 2.2.1). Further detailed mapping of the individual soil areas was carried out in the next stage of the research. Its aim was to specify the pedology of the individual areas and to find possible small isolated areas with different properties (especially phytotoxic). Due to the development of the stability situation between the years 2012-2013, attention was paid to new small slides and landslides. The result of this mapping stage was the discovery of up to 15 small phytotoxic areas and up to 17 tiny slides occurring in the individual pedological areas. The occurrences were measured and gradually plotted in the soil map. It is necessary to note that due to the long-term redevelopment and reclamation work, the number of phytotoxic areas and in particular the sloping areas is gradually changing, especially the stability situation has improved substantially in 2014 (redevelopment work is currently underway at the interface of pedological areas 2 and 3, 3 and 1. Within the research, phytotoxic areas have been given considerable space due to their properties, but their importance is minimal in terms of the reclamation because they do not represent 1% of the area under assessment.