Why do plants need sulphur?

Question

If you could explain in a simple form as i don't do biology and some references to good websites would be nice!

Answer 1

It is an ingredient in two of the amino acids, methionine and cysteine. So, plants (and all other life forms) need sulfur to make virtually every protein.

There are also a variety of other sulfur-containing compounds, but these vary somewhat among different forms of life