The main indicators of soil fertility based on the results of an agrochemical survey of agricultural lands in Chernivtsi region in the XI round (2016–2020) are given. It was established that the acidity of the soil solution in the region is dominated by lands close to neutral (31.8%) and neutral (36.5%). The weighted average indicator of saline pH is 5.8, which corresponds to a close to neutral reaction of the soil solution. According to the level of humus provision, soils with an average humus content prevail (66.7%), and the weighted average humus content in the region is 2.7%. According to the content of easily hydrolysable nitrogen, most of the lands have very low (48.3%) and low nitrogen content (48.7%). The weighted average indicator of easily hydrolysable nitrogen content for the reporting period is 106.4 mg/kg of soil, which corresponds to the low availability of this element. The region is dominated by lands with an average content of mobile phosphorus compounds (31.5%) and the average weighted indicator of the content of mobile phosphorus compounds is 56 mg/kg, which corresponds to average availability. In terms of the content of mobile compounds of potassium, lands with a very high content of potassium prevail (51.5%), although the weighted average indicator of the content of mobile compounds of potassium is 78 mg/kg, which corresponds to the average supply of the macroelement. It was established that in the Chernivtsi region the largest area is occupied by soils of average quality (68.5%), and the weighted average assessment of agricultural land in the Chernivtsi region is 51. A comparison of the quality assessment of the soils of the Chernivtsi region for the 10th (2011–2015) and 11th rounds (2016–2020) of agrochemical surveys was made. The results showed that the quality of the soils in the Kelmentsi and Kitsman districts has hardly changed. The soil quality assessment of Novoselytskyi, Hertsaivskyi, Vyzhnytskyi and Hlybotskyi districts improved by 3–6 points. The qualitative assessment of the condition of the lands of Khotynskyi (+8 points), Storozhynetskyi (+13 points) and Sokyryanskyi (+19 points) districts improved significantly. A decrease in land quality indicators was recorded in Zastavnivskyi (–3 points) and Putilskyi (–4 points) districts.

The article highlights the ecological danger of military operations on the territory of Ukraine. The results of experimental studies of the content of gross forms of heavy metals in ten soil samples taken from agricultural lands of Sumy and Okhtyrka districts of Sumy region are presented. Three samples were taken from the places where air bombs had fallen, seven from the places of broken military equipment. As a result of the conducted research, it was established that the background level in terms of lead content was exceeded in all soil samples, the average content of the element in the polluted territories was 5.4 times higher than the background value. Exceeding the background level in terms of zinc content was noted in nine out of ten soil samples, the average content of the element in the polluted areas was 3.9 times higher than the background value. The average content of cadmium in the polluted territories was 1.4 times higher than the background value (the excess was noted in eight soil samples). Exceeding the background value of the gross copper content was found in eight soil samples, on average, according to the experiment, the copper content is 4.6 times higher than the background value. Exceeding the background value for the content of nickel and iron was noted only in three soil samples, and the average content of the elements exceeded the background value by 1.2 and 1.1 times. The average manganese content in the polluted areas was 4.8 times higher than the background value (the excess was noted in six soil samples). Based on the results of the research, it was established that the gross content of lead (in six soil samples), zinc and manganese (in two soil samples), and copper (in five soil samples) from the sites of hostilities exceeded the permissible limits. The content of gross forms of cadmium and nickel did not exceed the MPC. A significantly higher coefficient of variation of the content of gross forms of heavy metals in the combat zone, compared to the content outside the combat zone (background value), may indicate the intensity of the influence of a negative factor on the soil cover. The highest degree of disturbance of the ground cover as a result of hostilities was noted in the places of burned equipment (the villages of Kosivshchyna, Stare Selo, Nyzy, Sumy district, Sumy region). According to the results of the correlation analysis, an extremely strong dependence was established between the content of the studied forms of heavy metals.

Influence of biological destructors Phylazonit SV and soil inoculant Phylazonit TO on yield of agricultural crops and basic soil parameters were researched. They included the following bacterial strains Bacillus circulans, Pseudomonas putida, Azotobacter chroococcum, Bacillus megaterium. It was established, that using Phylazonit SV before plowing at the rate 10 l/ha and in spring Phylazonit TO at rate 15 l/ha have increased pea yield by 22.8%, soybean by 21.9%, potato by 11.2%, maize by 19.4%. Additionally, the hummus parameters increased by 0.03–0.08%, lightly hydrolyzed nitrogen by 1.0–7.0 mg/kg, phosphorous movable forms by 2.0–6.0 mg/kg, potassium’s movable forms by 3.0–13.0 mg/kg soil. The soil-centric technology besides Phylazonit SV and Phylazonit TO with mineral fertilizers input came to pea yield increase by 30.1%, soybean by 36.8%, potato by 22.9%, maize by 35.8%. The soil-centric technology came to humus parameters increase by 0.05–0.1%, lightly hydrolyzed nitrogen by 5.0–15.0 mg/kg, phosphorous mobile forms by 8.0–18.0 mg/kg and potassium movable forms by 6.0–18.0 mg/kg in soil. The researched technologies for soil fertility evaluation showed the following notional net income for pea growing 315,7– 522,2 UAH/ha, for soybean growing — 585,0– 764,4 UAH/ha, for potato growing — 4516,0– 6284,0 UAH/ha, for maize growing — 1324,0– 2014,0 UAH/ha. The usage of technology profitability made for pea 9.8–12.6%, for soybean 13.7–18.3%, for potato 56.1–111.8%, for maize 31.2–40.5%.