The article shows the structure of repair, maintenance and protective activity carried out according to the State Program 2011-2015 for save exploitation of reclamation areas. Reclamation systems are analyzed, way how to prolong reclamation network without reconstruction is offered.

The structure and criteria for assessing the state of a closed reclamation network have been developed. The estimation is based on indicators of hydraulic engineering and water regimes, as well as water intake and drainage capacity of drainage pipelines. Numerical evaluation criteria are given.

Analysis of Belarusian hydro technical units and sludge storages of Belaruakali presents defects in investigations, design, engineering and exploitation as emergency reasons. The same method to evaluate comprehensively emergency risks of hydro technical units is the basis of methodical recommendations stated in Scientific Research Institute VODGEO. Experience of using proves this technique as an appropriate method to evaluate risks on Republican water reservoirs. Emergency list is stated for every risk situation and vulnerability of hydraulic structures which are typical for Belarusian reservoirs to be used as standard documentation for assessing the risk of reservoirs.

The article presents analysis of ecological reclamation condition of drain areas of Ratnovsky district in Volyn region for 2015-2016. Ecological reclamation condition is specified according its level of ground water, chemical composition of surface and ground water, water balance of the territory. It is found how these factors change in time under climate and anthropogenic pressure on agricultural landscapes. Modern factors of reclamation condition on drain territories are discovered and its characteristic is given.

Modern spatial differentiation of forest landscape of Belarusian Polesie formed under the influence of constant regional factors: the tectonic structure and hydrogeological conditions. Pressure water exit and metal migration solutions have led to formation of stable soilgeochemical localities on the cover quartz sands. Climate variability and anthropogenic impact on natural environment do not affect changes in the spatial chorology forest landscapes of the Belarusian Polesye.

The article presents the results of the study of micro fertilizer based on nanoparticles of insoluble compounds of the elements Co, Mn, Cu, Fe on meadow grasses. This fertilizer in doze 100+100 ml/ha added before mowing with NPK increase productivity of cereals and legume grasses as well as a mass of its root system. Seed treatment of hybrid clover and everlasting pea using nanofertilizer stimulate the growth by 27.5-31.3 % compared with a control sample and enhance the energy growth of ryegrass by 30.3 %. Nanofertilizer increases stress resistance of the plants by stimulating the growth of root mass.

The article investigates complex application of pesticides, microelements, growth regulators Ecosil for pre-sowing seed treatment and foliar top dressing of clover hybrid. It is found how these components enhance seed herbage structure and seed productivity. Microelements (boric acid, molybdenum-ammonium, Maxibor 21) for foliar top dressing in various phases provide maximal clover productivity of 2.74-3.0 centner per ha. Seed productivity growth by 0.8-0.95 centner per ha (32-44 %) was obtained due to various intensification agents.

The article compared the profit of organic fertilizer on peat basis and other organogenic materials in equal nitrogen dozes and described combined use of mineral fertilizers. It was studied how fertilizers affected agro and chemical features of sod-podzolic sandy loam soils and crop productivity of fourfold rotation. Combined use of fertilizers improved agro chemical soil state what increased crop productivity of field crop rotation.

This article describes how some foreign countries use animal waste as fertilizer. Advanced technology for liquid organic fertilizing widespread in Western countries is presented. The causes of pollution and methods how to reduce ammonia emissions into the air are given. These advanced technologies proposed to be introduced in the agriculture of our country, especially in farms with large livestock complex.

The study shows how Echynocystis lobata pullulates and spreads in various parts of floodplain of the river Sozh. One plant can occupy per season an area of 5-7 square m, the length of its liana achieves 4-5 m and climbs the trees up 5-6 m. In more humid habitats phenophase develops longer for 5-7 days than on bushes and trees does one.

The article describes the method how to estimate ecological status of water bodies of Kiev using data of remote sensing. The results of field experiments are compared with multispectral satellite images Landsat 8. Calculated indices are applicable to specify ecological state of water bodies.

The article shows both principle of operation of a tandem bridge of a forestry complex designed to improve drives capacity of forest machines, and features of installing and operating a bridge.