Fertility and ecotoxicological condition of light gray forest soils of the Ivanovo region

The results of long-term monitoring of light gray forest soil for agricultural purposes in the Ivanovo region are presented, which was carried out to establish the level of fertility according to the main agrochemical indicators, the content of mobile forms of trace elements and sulfur, the ecotoxicological state according to the content of gross and mobile forms of heavy metals, arsenic, caesium-137 and strontium-90. The average values of the indicators, their levels of change and trends in changes in the metabolic and hydrolytic acidity of the soil, availability of organic matter, mobile forms of nitrogen, phosphorus, potassium, exchangeable calcium, magnesium and other bases, mobile forms of boron, copper, zinc, molybdenum, cobalt, manganese and sulfur have been established. According to the content of trace elements in the soil, the needs for the use of micronutrients are determined. Changes, concentrations and trends in the mobile forms of cadmium, lead, copper, zinc, nickel, chromium, mercury and arsenic in the soil have been determined. The study established background values, changes and trends in the specific activities of caesium-137 and strontium-90, the density of their contamination of the soil of the site and the power of the exposure dose of gamma radiation. According to the Pearson–Spearman correlation coefficients, the peculiarities of the influence of the content of organic matter, the level of acidity and the capacity of cation exchange on the content of mobile forms of trace elements, sulfur, gross and mobile forms of metals and radionuclides were established.