The purpose of this work is to obtain and evaluate the fertilizing ability of the clay-nitrogen mixture. The relevance of the research lies in studying issues related to the minimization of nitrogen losses when producing the clay-nitrogen fertilizer, the transformation of nitrogen from fertilizer into the soil, and the effectiveness of fertilization when growing barley. The data on the content of nitrate nitrogen (250,986 mg/kg) and the total one (5.0%) indicate the effective binding of nitric acid by clay. The fertilizer can be considered potassium-containing, since the content of mobile and total potassium is respectively 1,250 mg/kg and 0.20%. Mobile phosphorus in the fertilizer is low compared to potassium (76 mg/kg), although the total pool is twice as large (0.45%). The content of the gross form of copper (8.9 mg/kg) and zinc (9.5 mg/kg) corresponded to the MPC.

The results of many years of original research based on soil-ecological monitoring showed the development of degradation processes of previously drained peat soils of the Ryazan Meshchera. Structural amelioration (sanding) of peat soils had some positive effect. The aim of the research was to study the properties of the dried peat soil at reclamation site Tinki-II in the settlement of Polkovo, Ryazan District of Ryazan Region, as a result of sanding. The most common type of German mixed-layer sanding was used in investigations. The methodology was based on the principle of comparing the state of dried peat soil before and after sanding. The content of the less than 0.01 mm fractions was 4.3 %, the rest consisted of particles from 0.25 to 0.05 mm; the pH of the salt extract was 5.7. Mineral fertilizers were applied in the experiment in small quantities: ammonium nitrate -180 g, superphosphate -185 g and potassium sulfate -260 g. The water supply was atmospheric-ground. Variant 2 was more effectivesanding with a dose of 1200 t/ha for sluicing and maintaining GWL = 90 cm, as evidenced by improved water-physical properties of the soil: the total porosity increased by 5 %; the total water capacity decreased from 270 to 70%, that was almost 4 times.

The popularity of vegetable fats among consumers around the world is growing rapidly. That’s why it is necessary to expand the range of using various agricultural crops’ oils in accordance with the content of useful components in them. Since vegetable oils have different storage stability, it is very relevant to establish optimal storage modes and terms. This research was conducted in laboratories using standard methods. Fatty acid composition of unrefined rapeseed, colza, camelina and sunflower oils were identified and compared. Two temperature conditions were considered (22°C, 4°C) in with and without exposure to light; in glass containers; with and without air access. From the results of research it was found that the optimal ratio of Omega-3 and Omega-6 is observed in Camelina oil. The obtained data indicate a direct influence of temperature and exposure to light on the dynamics of changes in peroxide and acid numbers of vegetable oils during the storage period. The most unfavorable storage mode for non-traditional vegetable oils was the mode with access of light at 22°C.

No abstract

To understand all the structural complexity of soil fertility, one can use the principal component analysis of factor analysis. Factor analysis, with all its shortcomings to identify structural relationships between variables, can be used to understand the complexity of soil fertility, by some assumptions. It can be estimated through bonitet. The work was carried out on the basis of materials from an agrochemical survey of agro-gray soils. Exchangeable acidity, mobile forms of phosphorus and potassium, humus, the sum of exchangeable bases and bonitet calculated in accordance with them were analyzed. The sample number was 68. Group 0 included bonitet with values less than 90 units and group 1 had bonitet with values more than 90 units. It was found that the contribution of exchangeable acidity and phosphorus to the first main component, which accounted for about 39% of the total dispersion, was maximum and equal to 0.7 and 0.84 units, respectively. Humus and potassium were positively associated with the second component (29% of dispersion) and their contribution was 0.7 and 0.81 units, respectively.