A field experiment was conducted to assess the impact of sulphur fertilisation on the yield and quality of small onion (CO (On) 5) grown in S deficient black soil (Vertic Ustropept) which was sandy loam in texture with available S content of 7 mg kg-1 . | Assessing sulphur nutrition to enhance the yield and quality of small onion (Allium cepa var. aggregatum) grown in sulphur deficient soil