The studies of the meadow-chernozem soil of the Omsk region, showed that biological products are effective when used for spring wheat by seed treatment. When comparing their action, it was noted that a greater effect was obtained from the use of the variants Azotobacterin+Phosphobacterin and Azotobacterin+Phosphobacterin+Humate K. The improvement of the nutritional conditions of plants when applying biological fertilizers and biological products has a positive effect on the content of the number of amino acids in the grain, which without fertilizers increases from 9.59% up to a maximum of 9.92% with Humat K.

This research is based on local monitoring in 1994-2018 on reference plots of agricultural lands and materials of a large-scale agrochemical survey. The research examined the soils of the forest-steppe zone of the Omsk Region: ordinary chernozem low-power low-humus heavy loamy soil; meadow-chernozem medium-thick medium-humus heavy loamy soil; and solonetz meadow chernozemic deep low humus clay soil. It was found that almost the entire surveyed area of arable land in the forest-steppe zone of the Omsk Irtysh Land (98.1 %) had low mobile zinc availability with an average level of 0.85 mg/kg. 41.1% of arable land had low mobile manganese availability, 41.3% had medium and 17.6% had high availability; the weighted average was 13.0 mg/kg. Most of the arable land was characterized by a low degree of mobile copper content security (81.2%), while 18.3% of the land had soil with an average content, and only 0.5% of the land had high mobile copper content. The average concentration was 20.0 mg/kg. The soil levels of mobile molybdenum availability wereas follows: 71.6% of land had medium availability, 26.5% had high, and only 1.9% had low; the weighted average concentration was 0.20 mg/kg. All soils had a high degree of mobile forms of boron, while the weighted average was 2.69 mg/kg of soil. 67.8% of the area had low mobile cobalt availability, 31.6% had average availability, and 0.5 % had high availability, with an average concentration of 0.16 mg/kg in the zone. The reference plots did not differ in terms of their content of mobile zinc, copper, and cobalt, ordinary chernozems, meadow chernozem soils, and deep solonetz. Movable connections of molybdenum, manganese, and boron in ordinary chernozem were lower than in meadow chernozem soil, and the maximum ones were observed in solonetz meadow chernozemic deep. Keywords: trace elements, content, soil, survey, dynamics, Omsk region

The purpose of the paper is to study the effect of foliar feeding with Zn and Cu chelates in the tillering period on the size and quality of the grain yield of spring common wheat during the cultivation on quasi-gleyic medium-thick, highly humus-rich, heavy loamy black soil in Omsk region. The field experiment scheme included the following options: without trace elements (control group); Zn10; Zn20; Zn30; Cu10; Cu20; Cu30. The use of Zn and Cu chelates for foliar feeding of plants during the tillering period had a positive effect on the yield, quality, germination energy, seed germination, the mass of 1000 grains and the unit of wheat grain. The increase in grain yield was 0.10-0.23 t / ha (4.5-10.5%) in average. In this experiment, the best dose of Zn and Cu chelates was 20 g / ha. The highest protein content was in the options with seed treatment with Zn20 - 14.35% and Cu30 - 13.95%, the yield of protein increased from 295 in the control group to 322-344 kg / ha when chelates were applied. The energy of seed germination significantly increased from 93.3 in the control group to 94.8-98.0%, with foliar feeding. When Zn chelate was used, the largest mass of 1000 grains (32.33 g) and grain nature (709 g / l) were formed in the Zn20 option, and when Cu chelate was used, the Cu10 option (32.45 g) was characterized by the highest value of the 1000-grain mass, which amounted to 717 g / l. D

The paper reflects the results of studying the temporal variability of carbon dioxide fluxes by the soils of deposits when they are introduced into agricultural circulation. The purpose of the research is to study the change in carbon dioxide emissions by the soils of fallow lands in the conditions of the steppe of Western Siberia. In 2022, research was conducted in the Omsk Region at key sites. The soils of the site are solodic, malodorous medium low-sodium columnar heavy loamy meadow-chernozem; cortical columnar heavy loamy saline meadow-chernozem, fine-grained low-humus heavy loamy meadow malt. Seasonal changes in carbon dioxide fluxes by soils on deposits when introduced into circulation using agrotechnical technology are significant (Figure 2) with a maximum in July (67.7 g CO2/m2/day) and a minimum in September (16.7 g CO2/m2/day); on deposits with combined technology, respectively, 54.4 and 14.1 g CO2/m2/day. Agrotechnical technology contributed to a greater emission of carbon dioxide from the soils of the deposit than combined. The system of agrotechnical techniques when introducing fallow soils into agricultural circulation has a significant impact on the release of carbon dioxide by the soil surface. Of the soil level of the deposit without treatment, it was 162% with agrotechnical technology (tillage), and with combined (tillage + herbicide application) 133%.

The research is based on the results of studying the effect of solid organic fertilizers based on cattle manure (cattle) of various storage periods on the supply of productive moisture and the chemical composition of meadow-chernozem soil. The studies were carried out at LLC RUSKOM-Agro, Omsk region in 2017-2018. The application of organic fertilizers significantly increases the content of nitrate nitrogen (from very low to very high levels), mobile phosphorus and potassium. In the first year of aftereffect, manure doses continue to have a significant impact on the nutrient regime of the soil. Moisture reserves before sowing were characterized as good (133-154 mm) without significant changes when applying manure.