New practical method of calculation of channels bandwidth allows us to find channel parameters of the most profitable profile having definite size of the section by charts and formulas. Some formulas are given to determine conveying capacity of water flow and minimum permissible flow speed for siltation in bed.

The article describes water wells of new design which are equipped with pipe regeneration systems and backfilled with clay sand. The wells are drilled at the water intake "Felitsianovo" in Minsk in 2015. The strength of the circulation pipes of wells regeneration system under ground pressure is calculated for the worst case on the example of the well number 3. Water absorbing ability of pipes was tested during natural hydraulic experiment both results of this experiment and technological recommendations for wells repair are presented.

The article contains data on artificial soil structurants, which provide good productivity and improve drainage ability of reclamation systems especially on heavy mineral soils which can improve permeability fillings in water-absorbing elements due to structurants. It is found how ameliorants increase water-absorbing ability, porosity and structural properties of the soil. Some soil structurants are selected as the most acceptable to water-absorbing drainage devices on heavy soils and beneficial.

The article describes installation for reverse reagent of water wells. Calculation mode is defined for compressor settings included in installation. Some recommendations are given concerning amount of reagent pumping in water well and regeneration time.

The article presents keramzite sand as filling for filter and operating columns of water wells. The research and comparing analysis of keramzite and quartz sand are maintained, friction force caused by contact of column and filling is calculated. Costs for materials are compared as well. It was found that water well equipped with filling of keramzite sand is better suited to overhaul.

The article itemizes various factors which affect nitrate level in plants according to research data and systemized information from literature. It is found that accumulation of these compounds in plants significantly increases due to the nutrition imbalance. We get the lowest nitrate level if perennial grasses are fertilized with nitrate top-dressing of delayed action. Potassium nitrate increases nitrate level in plants. Weather conditions influences nitrate content. Daily nitrate dynamics was fixed: the lowest nitrate level was during evening grass harvest.

The article presents how previous crop affects present one, main cultivating and fertilizing methods are described, growth regulators of oilseed yield of winter rape are given in the case of fodder crop rotation on anthropologically transformed peat soils of Polesye region. It is found that oilseed yield of winter rape increases by 45centner per ha and profit is about 600 $ per ha due to aftereffect of green mature of oil radish (protective crop) and surface disking with fertilizing what is balanced according to crop removal and includes copper, boron, humate and ecosil.

The article demonstrates trailer units for liquid and semi-liquid manure. Their technical characteristics are presented, exploitation is described.