SOP — Chloride-Free Potassium & Sulphur for Quality Crops
Potassium sulphate provides 50% K2O and 17% S without the chloride that damages sensitive crops — tobacco, potato, grape, citrus and avocado all show quality penalties when chloride exceeds varietal tolerance thresholds. SOP is the premium potash choice for export-oriented horticulture and high-value field crops where tuber specific gravity, sugar content or leaf burn resistance determine market price. From 1,000 MT.
Quality Parameters
- FOB
- CFR
- CIF
- Agriculture
- Blending
- Fertigation
Crop Programmes
SOP applies at 100–250 kg/ha on potatoes at tuber initiation, and at 150–300 kg/ha on flue-cured tobacco during potash uptake peaks. Soluble grade SOP dissolves for fertigation; granular grade suits broadcast and bed application. Premium pricing over MOP reflects both chloride avoidance and added sulphur nutrition. FOB/CIF worldwide.
FAQ
Is SOP worth the premium over MOP for all crops?
Only for chloride-sensitive crops where quality premiums justify the 40–80% price differential. For wheat, maize and cotton on non-saline soils, MOP delivers equivalent potassium at lower cost per kg K2O.
Can SOP be used in fertigation systems?
Yes — soluble SOP grades dissolve to supply K⁺ and SO₄²⁻ through drip and pivot systems. Dissolution rate is slower than KCl; use warm water (above 20°C) and adequate mixing time in stock tanks.
Does SOP supply enough sulphur for high-demand crops?
The 17% S in SOP covers moderate sulphur needs for potato and tobacco. Canola and rapeseed with high sulphur demand may still require supplemental ammonium sulphate even when fertilized with SOP.