Composition of soil of dumps of technogenic territories at the loose field receiving

The purpose of the research was to study the environmental conditions of land part of technogenic territories for the suitability for the growth of tree and shrub crops. The main characteristics of soil conditions for growth of the highest vegetation were: particle size distribution of soil, chemical composition of soil, security with water, aeration, warming opportunity, etc. The suitability of the dumps of overburden works to the growth of higher plants on water and physical, hydrological, agrochemical indicators was analyzed. It was established that considerable areas of technogenic territories in the basin of the river of Koloromo of the North Yenisei area could be suitable for the growth of wood and shrubby vegetation. The main indicator of the suitability of technogenic soils for the growth of vegetation in terms of particle size distribution was the presence of fine soil fraction (less than 2 mm), which was necessary for seed germination and seedling rooting, moisture accumulation and the provision of plants with necessary nutrients. From the presented classification of soil by particle size distribution the most part of technogenic soil was suitable for growth of the highest vegetation. Unsuitable soils included only boulder (block) soils of overburden and well-washed boulder (block) and pebble (crushed) soils without filler of hale wash dumps. The prevalence of boulder (clumpy) fractions without filler in overburden rocks was met rather seldom therefore the formation of boulder (clumpy) dumps of overburden rocks practically did not happen. It should be borne in mind that the content of fine earth in the body of medium and poorly washed heap dumps and the dumps of coarse eifel increases with the decrease in the layer due to the fact that fine earth under the influence of precipitation and gravity moves from the upper layers to the lower ones. In addition, the amount of fine earth in the productive layer may depend on the formed relief of these types of dumps, so the content of fine earth on the dump crest will be lower than in depressions.