Southeast Estonia's Soil Depletion Threatens Agricultural Productivity and Food Security.
The study looked at why soils in Southeast Estonia lack important nutrients like copper, fluorine, mercury, manganese, phosphorus, lead, zinc, and uranium. They found that these elements are naturally low in the soil there, rather than being lost from the top layer of soil. Elements like copper, manganese, phosphorus, lead, and zinc stay put in the soil, while fluorine and uranium are less in the top layer but more in the parent material. Mercury, on the other hand, is more concentrated in the top layer of soil.