The Dynamics of the Reduction of Arable Land Areas According to their Long-term Monitoring in the Tomsk Region

Abstract

The results of agroecological monitoring of arable and fallow lands are considered. It has been established that the content of humus and mobile phosphorus in the soils of the fallow, as well as the value of the salt pH, is lower than on arable land; mobile potassium is higher. This may be due to the migration of deposited potassium from the lower soil horizons into the humus horizon and its release from the absorbed state during the decomposition of organic matter. It was revealed that in fallow soils, the content of mobile phosphorus in the range of 150–600 mg/kg directly correlates with the value of salt pH (4–6 pH units), while this dependence is not observed on arable land.