ASSESSMENT OF THE POSSIBILITY OF USE OF CHEMICAL MELIORATIONS IN THE ZONE OF RISK FARMING
The article deals with the use of bottom sediments as an ameliorant on agricultural lands. The flood situation in the Amur region, which has deteriorated significantly over the past ten years, violates the integrity of the soil cover of agricultural land. The introduction of bottom sediments will improve the water-physical and chemical properties of the soil. During the engineering protection of the settlement, which consisted of dredging and clearing the bed of the Yarchikha River, samples of bottom sediments were taken for physical and chemical analysis. According to the analysis, bottom sediments are represented by loamy, fluid silts, with an admixture of organic substances, underlain by fluid, gravelly sandy loams, silty sands, loose, water-saturated, sands of medium size. Conducted laboratory studies of bottom sediments on the content of radionuclides showed that the specific activity is within the natural background at all sampling sites. The total indicator of chemical pollution of bottom sediments is within the acceptable range from 1.53 to 4.69 mg/kg, respectively, the assessment of the degree of soil pollution with chemicals is characterized as weak. Bottom sediments of the Yarchikha River belong to the 1st category of soil pollution, which allows their use as an ameliorant.