A new energy-saving method demonstrates how to remove siltation in drainage by OD-100 equipped withnew types of cleaning nozzles

The article presents the results of physical modeling of operating of efficient drainage construction in weakly permeable loam. The efficiency was comparedaccording two indicators: the performance of construction (imitation of withdrawal of storm precipitation during long wet period) and maximum withdrawal during continuous precipitation. Ranked series of the index of relative performance and maximum drained rainfall precipitation are obtained. Variant with filtering backfill up to soil surface is recognized as the best.

Soil drought is an actual problem in Belarus. Deterministic properties of variability of drought indicators presented as main harmonic components are shown as expedient ones.36-year modeling series of indicators of soil drought obtained by retrospective method are presented in this article as n/2 of harmonic components for 6 regional weather stations of Belarus.A significant reduction in the total dispersion of the original series was detected as harmonic trends are calculated and deleted

The article presents the efficiency of new experimental absorber columns equipped with a filtering backfill of mixed top peat and local low filtered soil to remove surface and groundwater of enclosed depressions in heavy soils. Modern absorber columnsand technology of its installation are described. Weather conditions which are typical for the area of construction of experimental absorb columns are characterized and preliminary conclusions according its performance in the 2017 weather conditions aredrawn

The article presents main hydrological factors, ground composition of coastal slope, forms and sizes of the slope which affect processing of coastal slopes of reservoirs. Further the processing develops under the influence of non-hydrological factors. This fact is proved by statistical analysis of natural observing, actually by coefficient of multiple determination what shows how are definite factors affect the process. All characteristics of coast are summarize according average value of trend and stochastic noise - alternating fluctuations, which are recommended to be taken into account when performing predictive calculations for processing coastal slopes.

The article presents research results according efficiency of spring wheat cultivated on drained areas of complex soil cover in Poozerie region. Productivity of spring wheat depends on weather condition, period of2016-2017 is a good example of such impact. Growth regulator Ecosil improves the productivity of spring wheat. Relatively smaller yield waf obtained in the variant of retardant Terpal, which indicate sthe resistance to lodging of spring wheat. Following the agro technical of its cultivation, it is possible to ensure cost-effective grain production in the Vitebsk region

The article presents how oil radish cultivated as aplant-precursor for green feed and siderat affects productivity and economic efficiency of technology of corngrowing for grain. Methods of main tillage on anthropo-genic-transformed peat soils and systems of fertilizersare also shown as crop-forming factors

The quality of lawns is evaluated. Dehydrated fermented wastewater sludge and sewage sludge in the field map accumulators for filtration of industrial waste-water are presented as soil improver. Direct action andaftereffect of these sludges increased density and improved admixture of lawn grasses, what enhanced good quality of lawns

The article compares traditional and organic agricultural systems and how these systems affect coenosis of weed vegetation and phyto-pathological situation of marrow crops. Obtained data according weeds shows tendency to increasing vegetation under organic system of cultivation. Development of diseases in marrow cultivated traditionally and organically is characterized as moderate. Phyto-improving effect of bacterial fertilizers, compost, natural additives and biological remedies in organic system is higher compared with traditional one. Productivity analysis shows that averagely yield level of marrow of traditional cultivation is 139.3 t/ha and of an organicone is 75.6 t/ha

During vegetation period plants of Bidens frondosa L. change its ontogenetic state and morphometric parameters such as height, number of pairs of leaves, length of leaf change too. The highest aerial phytomass, the thickness of the shoot, the number inflorescences and the number of seeds in one inflorescence, the mass of 100 seeds in the first population were higher than in the rest ones. In ontogenetic structure there are a few species of the follow age status: sprouts, juvenile, immature, virginand generative plants. Their quantitative relationshipschange as the seasonal rhythm of development passes