The analysis of the structure, scope and costs for reconstruction of drainage system which was carried out under the State program of conservation and use of reclaimed lands of 2011-2015 is presented in this article. The article also demonstrates the data on the use of agricultural land before and after the reconstruction of drainage systems. Growth expense of farmlands is proposed as one of efficiency indicators of investments in reconstruction.

The article describes the effect of wind speed on mean radius of irrigation during sprinkling. The dependence is presented what determines the coefficient of wind effect on mean radius of irrigation. Right position for jet sprinkling unit s is recommended as well.

The article considers the problems of melioration during the exploitation of water resources of a trans-border watercourse on the example of the river Kura, and a plan of possible distribution of water among the states of the basin is given. The conclusion suggesting that the development of the concept of the distribution of trans-border waters among the neighboring states: Georgia, Armenia, Azerbaijan, Turkey and Iran, is possible by establishing the bank of the most recent data about the components of using the water reserves (rivers, water reservoirs, lakes, marshes, underground waters, glaciers) is made. For this purpose, it is necessary to conclude an agreement about getting engaged in the work to develop “The reference book of the water resources of South Caucasus”, developing single methods to gather the information and then, by observing the international standards, adjusting the study to develop the concept about the distribution of trans-border waters by considering a thorough solution of the ecological problems. The developed methods to distribute the water resources among the neighboring states can be used as the basis to conclude an inter-governmental agreement for the above-listed five countries.

Detailed economic calculations, the rate of agricultural cost, the water cost for irrigation, operating cost to maintain irrigation system and watering should be taken into account to select the optimal irrigation mode and irrigation system. The alternative technologies of plant growing products are estimated both in sprinkling and drop irrigation regime, how its results depends on specific conditions is shown in this article.

Hydrodynamic reagent-free flushing of pre-screen zone of water well with annular cleaning system is studied in laboratory and nature conditions. The flushing filtration flow velocity is proposed to be 1-2 cm/s to minimize washing. Due to well regeneration productivity increased 3,9 times.

This article describes key questions about the increase of efficiency of reclamation during extreme weather conditions and dry period as well. It is necessary to change the approach to the existing principles of reclamation which are based on the gravity weakly regulated sink from draining objects. Discrete regulation implemented by gravity pumping systems and vertical drainage which is able to provide irrigating and fire prevention activities with groundwater is recommended to be widely used. Article includes the examples of exploitation of such systems. The system of dug reservoir is recommended as a mode to reduce negative influence of dry and cold period on agricultural crops. Author gives us the example of hydrological regime of such dug pond at Polesye experimental station of reclamation agriculture and meadow growing.

The methods justify the location of the retaining structures drainage systems woodland for water management at the local flow in modern hydrological and climatic conditions. The average distance between the water retaining structures at the conductive channels of reclamation systems Polesie is 1000 m, and main-2000 m. Received by the clearing mark the boundaries of the humidifying water retaining structure area of moisture should be compared with possible area of wetting, determined by comparing the volume of runoff from the watering guidelines of the respective security. The volumes of flow 50% exceedance probability is recommended to be calculated using the flow rates determined by available contour maps for the relevant zone. To transition from volumes of flow 50% exceedance probability for flows of 75 and 90% probability should be used respectively the coefficients of 0.72 and 0.52. Humidifier standards for southern hydrological-climatic zone are accepted on TCR-45-3.04-178-2009. The optical period of accumulation of local runoff for woodland period is 2 decade of April-August. The appropriateness of the device for water retaining structures or operating expenses to carry out preventive sluicing at the local runoff is determined not only on the basis of topographical and hydrological data, but also compare the costs of construction of water retaining structures or operating costs for the locking with the value of additional agricultural production.

Hydraulic research was carried out to test the flow through the vacuum spillway in the case when spillway whole is opened completely or partially. The curves of the pressure distribution on the spillway surface are obtained. The use of dams designed according to coordinates of N.P. Rozanov is possible in building hydropower stations on the rivers of Belarus. Vacuum-free spillway was replaced by vacuum spillway in the water station of Polotsk hydroelectric power station, the economic effect of such replacement is demonstrated in the article.

New approach is represented for classification and diagnosis of anthropogenically improved soils of all evolution stages. 35% is considered as threshold of organic matter in the upper peat-mineral horizon to distinguish agro peat soils and organic mineral soils. New criteria for diagnosis are developed using established regularity in the degree of changing of genetic properties in the peat soils of various evolution stages.

The article presents the data on the growth soil productivity at loess loams draining. Various methods of draining are analyzed, the most effective ones are recommended for loess loams draining. Due to activities which include various methods and modes of draining soil water air regime, growth conditions for agricultural crops and crop yield are improved. The reclamation activity was estimated in terms of seeded area increase and growth of agricultural crops. Obtained data prove the expediency of reclamation activity on soils with atmospheric type of water supply which are formed by loess loams which area is covered with bushes of 30% and more.

The article presents the results of the study which discovers that microelements in chelated form and growth regulators such as Elegum-Copper + Elegum-Boron or Elegum-Boron + Humates are used as top-dressing against the backdrop of macro fertilizers on anthropoginically transformed soils of Polesye provide yield growth of winter rape oilseeds of 3,8 and 4,7 c/ha respectively increasing the overall level of its productivity up to 43,1 and 44,0 c/ha.

Adding of peat-manure compost and loam to the sandy soddy-podzolic soil had a positive impact on its agrochemical properties. As a result the number of microorganisms of different physiological groups and activity of hydrolytic enzymes increased. The number of bacteria of the nitrogen cycle increased significantly, what is important for increasing the fertility of sandy soils. Activation of biological processes in the optimized sandy soil stimulated the formation of high yields of potatoes and barley.

The article presents aspects of effective land use. Soil characteristics on its granulometric structure, genetic affiliation and humidification degree are shown. Land types are defined on the whole area of agricultural production cooperative of Frunze, maps of soil sounding are created, database is developed. Author formulates the theoretical background, substantiates methodological approaches and defines the criteria and principles of selection of soil and environmental micro regions and land types.

With regard to the Lake District almost no possibility of obtaining corn. This is particularly true of sloping lands, which predominate in the region. All this determined the subject of our research. It takes into account the fact that the cultivation of row crops on steep slopes with more than 5 ° can enhance water erosion. Therefore, studies were selected areas with lower slope of the surface, typical Lakeland. Based on studies in Senno district, Vitebsk region revealed the effect of weather conditions on the yield of maize harvested for grain.

Two re-grassing ways for herbage based on preliminary cultivation of the field culture before re-grassing and without preliminary cultivation are compared in conditions of reclaimed sod-podzolic sandy loam soils and sod-gley sandy one. It is found how re-grassing ways affect productivity of grass and legume-grass herbages with trifolium repens and trifolium prate. Regrassing way affects the content of trifolium repens and trifolium prate in herbage. Estimation of herbage economic efficienc y shows that legume-grass herbage with trifolium repens formed due to re-grassing without field period gives maximum income and higher profitability

The article presents the results of studies on the effect of simple shapes and complex brand N10P19K25 fertilizer to prolong productive longevity pasture grasses. Simple forms of fertilizers in the amount N45P20-40K90 or complex in a dose N20P38K50 (spring) and N30P57K75 (spring or N20P38K50 spring + N10P19K25 after 2 cycles of grazing) are economically reasonable to increase the yield of herbage of the sixth-eight year use with legume content of 20%. This provides a yield per hectare pasture of 5,32-5,95 t / ha of fodder units at the lowest cost 14,6-20,4 USD / t.

Standards for project irrigation regime were developed on sod-podzolic loamy soils in the north-eastern part of the Republic of Belarus on the experimental basis. Project irrigation norms and minimum inter-irrigation intervals were determined for Echinochloa frumentaceae in the years of different moisture supply. Optimal water regime is defined for cultivation of that crop on sodpodzolic loamy soils. The economic efficiency of Echinochloa frumentaceae was estimated as well.

The care unit for hydraulic structures (pneumatic system and painting equipment) is used as a standard pneumatic drive and pneumatic equipment which are used for maintenance and repair of hydraulic works on drainage systems.

The article discusses the impact of running systems of wheel tractors on the ground, determines the parameters of the running of the tractor of factory assembly with dual wheels and ballasted with water, it is proposed technical solution to reduce the power of dual wheels in the curvilinear motion of the tractor.

The article describes the principles of information system for data long-term monitoring according to the hierarchy of the time axis in calendar time representation. All the statistics options at three levels of aggregation of multi-year term hours of observation time are considered. We present all the options projecting an n-dimensional hypercube time series of measurements on planar two-dimensional table calculating their size. The possibilities of placing the data in the tables at the critical number of columns, through their transposition are analyzed.