ANALYSIS OF ENVIRONMENTAL RISKS FROM AGRICULTURE IN LENINGRAD REGION
The inefficient processing of large volumes of animal/poultry manure and its use as an organic fertiliser makes it difficult for agricultural enterprises to function normally and poses a serious obstacle to the agro-industrial complex development in Leningrad Region. At the same time, there is one more environmental and economic problem in this region - to maintain and improve the soil fertility of agricultural land. For environmental assessment of agricultural enterprises, the data on the number of farm animals and poultry in each municipal district of Leningrad Region was collected; production and accumulation of animal/poultry manure in each district were considered and the feasibility of its application as an organic fertiliser to the agricultural land in this district was assessed. Calculations showed that the districts featured different nutrient load on the environment. Most of the them had the potential to apply additional nitrogen with organic fertilisers on the available agricultural land. Only two districts - Vyborgskij and Kirovskij Districts, had a shortage of land to apply the produced 2172.9 and 8433.2 t N/year, respectively, that might result in environmental risks. However, the nutrient load in these two districts could be relieved by applying the produced organic fertilisers to the agricultural land in the neighbouring districts, as the total potential for nitrogen application in Leningrad Region is positive: +8769.2 tons of nitrogen per year.