In the article the methods of the development of mathematical models of growth of even-aged stands is considered. We have developed the mathematical provision of the automated control systems (ACS) of modes of cleaning cutting of a forest with the target function of the productivity of forest stands. We have also obtained the numerical performance of the ACS modes of forest cleaning cuttings by means of the results of the experiments
About 40 soil cuts were made in various parts of the city of Rostov-on-Don. The determinations of enzyme activity (catalase, invertase, polyphenoloxidase) were carried out in natural and antropogenic soils of a sub-urban park, residential and industrial areas of the city. The enzyme activity of soils in urban condition signif-icantly lowers than in non-urban soils. It is established, that significant impact on the biological activity has duration of sealing, and the longer the period, the higher the negative impact on the enzymes activity. However, a close relationship between humus state of soil and its enzyme activity kept in a condition of ur-ban pedogenesis. The high activity of investigated enzymes is typical to soil horizons which contain the highest amount of soil organic matter
Significant changes in mountain ecosystems occur after deforestation on limestone massifs of the Western Caucasus. Tall-mountain-meadow vegetation with a large variety of species formed at low and medium soil disturbance 3 years after logging. Physical and biological properties of calcareous soils also vary greatly. The values of biological activity decrease at the maximum load is more than 10 times. Biological activity is increased by 20-50% or more cutting stations with low disorders. Biological properties of soils (especially the enzymatic activity) are very sensitive indicators of changes that have occurred as a result of logging. Changes in the activity of soil hydrolases different from changing oxidase activity at different times after logging
The article examines the theoretical aspects of purposeful management of regional economic objects. We have also allocated the principles and the regularities of the target programming
Данная статья посвящена гражданским делам, рассматриваемым судами и связанным с признанием права собственности на самовольную постройку. Для рассмотрения подобных споров необходимо уяснить четкое определение самовольной постройки, рассмотреть специфику исков о признании права собственности на нее, а также основания, связанные с признанием права собственности на самовольную постройку
In this article, agrochemical properties of the mining rocks at the industrial embankment of Kursk Magnetic Anomaly and pine indices of growth have been analyzed. A conсlusion has been made about the impossibility to grow long-term pine plantation without substrate fertility increase measures
The process of getting of paste and feature of chitosan natural bioactive additive which is got with the help of the improved technology and its chemical composition, methods of assessment of the quality of the finished product are examined in the article
The experimental data of the study of physical and mechanical properties of nanomodified "poor" concrete for road clothing base creation is presented in this article
The results of studies of copperhead (2008-2011) in the Volgograd region are shown, geographical distribution, habitat association, environmental characteristics are examined; morphological characteristics of species in the study territory are given
In this article, contact conditions are investigated at superficial plastic deformation by running-in rollers of details by a method of load cells