Composition of brazilian phosphate rocks used for cattle feed supplement.
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Pbospbate rocks cünstitute lhe bulk of the raw materiaIs for the manufacture fertilizers and some phosphorus b-ased chemicals. !t is well known that natural pbosphate a great varíation of heavy melaIs, and some of lhem, depending of tlleir cOllcentratÍon, present nutritional lmd environmental problems [1].
Palabras clave
Brazilian phosphate rocks, Cattle feed