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Sulphur is essential for plants, thiamine is one of the 20 aminoacids. Structural albumins, globulins or enzymes are built from aminoacids. Plant need sulphur, in form of solubile sulphate,not too much but esssential. Most fertilizers do not contain sulphate because ca and sulphate precipitate in water as useless caso4. Polyhalit is a soluble sulphate complex, contains ca, mg and a little k.


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