Uranium is a highly toxic heavy metal, particulary to children. Since more than 80 years phosphate fertilisers are used in the worlds agriculture. It is well known, that uranium is a part of phosphat fertilisers that derive from the oceans sediments. In the time from 1950 to 2010 In Germany the farmers put more than 13.000 tons of uranium on the soils. Germanys drinking water is under threat because this kind of uranium (uranly ions) is highly soluble in water.