4-in-1 multi-nutrient mineral composition
Polysulphate supplies primary and secondary nutrients in balanced, plant-available sulfate forms.
- Potassium (14% K2O): Soluble potash that activates enzymes, regulates stomatal water balance, and improves fruit size and disease tolerance.
- Sulfur (19% S): Readily available sulfate sulfur (SO4-S) essential for amino acid synthesis (cysteine, methionine) and oil synthesis in oilseed crops.
- Magnesium (6% MgO): Central structural atom of chlorophyll molecules, indispensable for maintaining high photosynthetic rates.
- Calcium (17% CaO): Essential for cell wall elongation, membrane integrity, and preventing disorders like blossom-end rot in vegetables.
- 100% Natural Polyhalite: Mined mineral with no chemical synthesis, making it suitable for integrated and sustainable farming systems.
Prolonged release profile and low salinity advantages
Polysulphate dissolves steadily over 50 to 60 days, matching the nutrient uptake curve of growing crops.
- Sustained Nutrient Release: Unlike highly soluble potassium chloride (MOP), Polysulphate releases nutrients gradually, minimizing leaching in sandy or high-rainfall soils.
- Very Low Salt Index: Safe for sensitive root systems, seed-furrow applications, and greenhouse soils vulnerable to salt accumulation.
- Chloride-Free Option: Extremely low chloride content makes it ideal for chloride-sensitive crops like tobacco, potato, tea, grapes, and berries.
- Neutral pH Impact: Does not acidify or alkalize soil upon dissolution, maintaining optimal rhizosphere pH balance.
Crop recommendations and application methods
Applying Polysulphate as a basal or early top-dressing satisfies multi-nutrient crop removal.
- Oilseeds (Mustard, Groundnut, Soybean): High sulfur content significantly boosts oil synthesis, seed weight, and pod filling.
- Pulses & Legumes: Supplies sulfur and calcium required for effective Rhizobium nodulation and protein accumulation.
- Horticulture (Potato, Tomato, Onion, Fruits): Improves skin finish, tuber firmness, and post-harvest shelf life.
- Application Method: Broadcast and incorporate into the soil during basal land preparation or blend with DAP and urea.
Official source
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Department of Fertilizers (Ministry of Chemicals & Fert) ↗Related on KisanPe
Common questions
What four nutrients are present in Polysulphate fertilizer?
Polysulphate supplies Potassium (14% K2O), Sulfur (19% S), Magnesium (6% MgO), and Calcium (17% CaO) in natural sulfate mineral forms.
How does Polysulphate differ from MOP (Muriate of Potash)?
MOP provides only potassium with high chloride and rapid leaching, while Polysulphate provides potassium, sulfur, magnesium, and calcium in a slow-release, low-chloride format.
Is Polysulphate approved under the Fertilizer Control Order in India?
Yes, natural polyhalite (Polysulphate) is officially recognized and registered as a multi-nutrient mineral fertilizer under the Indian Fertilizer Control Order (FCO).
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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