Some key functions of S in plants are:
(1) Formation of chlorophyll, the green substance in leaves that permits photosynthesis. plants produce starch, sugars, oils, fats, vitamins and other vital compounds through photosynthesis.
(2) Protein production, primarily because S is a constituent of three s-containing amino acids (cysteine, cystine and methionine), which are the building blocks of protein. About 90% of plant S is present in these amino acids.
(3) Synthesis of oils. this is why adequate sulphur is so crucial for oilseeds.
(4) Activation of enzymes, which aid in biochemical reactions within the plant.
(5) Increases crop yield and improves produce quality, both of which determine the market price a farmer would get for his produce.