Long-Term Dynamics of Agrochemical Parameters in Chayinsky Forest Nursery of Tomsk region

The results of the 9th agrochemical soil survey of the Chainsky forest nursery of the Tomsk region are presented. Soil fertility was assessed on a producing area of 11.5 hectares, including 13 elementary soil plots. The survey identified 7 main indicators of soil fertility: acidity, hydrolytic acidity, humus, mobile phosphorus, exchangeable potassium, degree of acidity and granulometric composition. The low fertility of the growing fields was established and a comparative characteristic was carried out with the data of the previous agrochemical survey. There has been a strong acidification of soils in the last 10 years and a decrease in humus content to a minimum level. Based on the results obtained, recommendations are proposed to increase soil fertility for the cultivation of standard planting material in a timely manner.