^quote Radioactive polonium-210 contained in phosphate fertilizers is absorbed by the roots of plants (such as tobacco) and stored in its tissues.[109][110][111] Tobacco plants fertilized by rock phosphates contain polonium-210, which emits alpha radiation estimated to cause about 11,700 lung cancer deaths annually worldwide. ^endquote from http://en.m.wikipedia.org/wiki/Polonium
Rock phosphate is of course the mineral phosphate you buy in a bag at a store. It’s recommended for organic farms :-( It’s mined in Florida
Much of the research on plant metabolism was done on tobacco (follow the money) but if tobacco takes it up it’s very likely that the majority of vegetables and fruit trees will take it up.
Polonium is also a breakdown product of uranium. Wonder how much California got from Fukushima?
Another reason to compost as composting will facilitate microbial detoxification of _small amounts_ of polonium and several other types of heavy metals. And will return your phosphate to you :-)