Ammonium Sulphate — Nitrogen & Sulphur in One Granule
Sulphur deficiency now affects over 30% of arable land globally as atmospheric deposition declines. Ammonium sulphate delivers 21% N and 24% S in a single granular product, correcting both deficiencies without separate sulphur applications. The acidifying effect suits alkaline soils and crops with high sulphur demand — canola, onions, cotton and alfalfa. Granules 2–5 mm for bulk blending and direct spreading. From 1,000 MT.
Grade Analysis
- FOB
- CFR
- CIF
- Agriculture
- Blending
- Fertigation
Industrial Use
Beyond agriculture, ammonium sulphate serves as a flame-retardant additive, fermentation nutrient and wastewater treatment chemical. Fertilizer-grade shipments move in bulk or 50 kg PP bags; industrial buyers often prefer big-bag format for automated dosing systems. Free acidity capped at 0.05% ensures compatibility with mixing equipment. FOB/CIF to port or inland terminal.
FAQ
Which crops benefit most from ammonium sulphate?
Oilseed rape, canola, alfalfa, onion and garlic show the strongest yield response to AS application due to high sulphur uptake. Cotton and maize on sandy, leached soils also respond well when soil sulphate tests indicate deficiency below 10 mg/kg.
Does ammonium sulphate acidify soil over time?
Yes — each 100 kg/ha of AS application adds acidity equivalent to roughly 30–40 kg/ha of elemental sulphur oxidation. On alkaline soils this is beneficial; on already-acid soils below pH 5.5, monitor pH and alternate with calcium-containing nitrogen sources.
Can AS be blended with urea in bulk mixing plants?
AS and urea blend compatibly for immediate application, but avoid long-term storage of mixed product — urea hygroscopicity combined with AS acidity can accelerate caking. Blend within 48 hours of application for best flow properties.