(S) is vital for life. It is one of the major essential nutrients required by all humanbeings, animals and plants. Agricultural crops require S in amounts similar to phosphorus (P), and S is as important as nitrogen (N) in plant growth and in the formation of crop yield and quality. Historically, S was supplied to agricultural crops in manures, by various farming practices and through atmospheric deposition. However, with the advent of more modern fertilizers, the S needs of crops were substantially supplied as an incidental constituent of two of the principal fertilizer materials single superphosphate (SSP) and ammonium sulphate (AS), Sulphur in powder form and by the sulphur dioxide added to the atmosphere by a coalburning society.

(S) is vital for life. It is one of the major essential nutrients required by all humanbeings, animals and plants. Agricultural crops require S in amounts similar to phosphorus (P), and S is as important as nitrogen (N) in plant growth and in the formation of crop yield and quality. Historically, S was supplied to agricultural crops in manures, by various farming practices and through atmospheric deposition. However, with the advent of more modern fertilizers, the S needs of crops were substantially supplied as an incidental constituent of two of the principal fertilizer materials single superphosphate (SSP) and ammonium sulphate (AS), Sulphur in powder form and by the sulphur dioxide added to the atmosphere by a coalburning society.