Nutrient Composition and Agronomic Value
Potassium Schoenite (K2SO4·MgSO4·6H2O) is a natural double salt mineral that supplies three secondary and primary nutrients in balanced, plant-absorptive forms.
- Chloride-Free Potassium (23% K2O): Eliminates chloride toxicity risk in sensitive crops, improving sugar synthesis, fruit sizing, and rind thickness without scorching leaves.
- Readily Available Magnesium (11% MgO): Magnesium forms the central core atom of chlorophyll molecules, directly preventing interveinal chlorosis and sustaining photosynthetic rates.
- Secondary Nutrient Sulphur (16% S): Supplies sulphate sulphur required for synthesis of essential amino acids (methionine, cysteine), aromatic oils, and proteins.
- Low Salt Index: Possesses one of the lowest salinity indices among commercial potash fertilizers, making it ideal for saline-prone soils and protected greenhouse cultivation.
Target Crops and Application Schedules
Potassium Schoenite is tailored for drip fertigation and foliar nutrition in high-value horticulture and open-field cash crops.
- Grapes and Pomegranate: Applied during fruit development and berry enlargement stages to enhance sugar accumulation (Brix), bunch uniformity, and shelf life.
- Potato and Tubers: Improves tuber dry matter, starch content, and storage durability while eliminating chloride-induced hollow heart.
- Banana and Citrus: Corrects common magnesium deficiency in acidic soils, promoting vigorous leaf greening and fruit weight gain.
- Foliar and Drip Compatibility: Completely soluble in water without leaving insoluble grit, making it safe for drip emitters and micro-sprinklers.
Application Guidelines and FCO Quality Standards
To ensure maximum nutrient uptake efficiency, growers should adhere to tested application rates and compatibility practices.
- Drip Fertigation: Inject dissolved fertilizer through venturi or fertilizer dosing pumps in split doses during peak potassium-magnesium uptake phases.
- Foliar Spraying: Dissolve in clear spray water at recommended label concentrations, spraying during early morning or late evening to maximize stomatal absorption.
- Tank Compatibility: Compatible with most neutral fertilizers, but avoid combining in high concentrations with unchelated calcium products in the same tank to prevent calcium sulphate precipitation.
Official source
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Department of Fertilizers, Ministry of Chemicals & Fertilizers ↗Related on KisanPe
Common questions
What nutrients does Potassium Schoenite supply to crops?
Potassium Schoenite supplies three essential nutrients: water-soluble potassium (23% K2O), magnesium (11% MgO), and sulphur (16% S).
Why is Potassium Schoenite preferred over Muriate of Potash (MOP) for grapes and potatoes?
Unlike MOP, which contains high levels of chloride that cause leaf tip scorch and poor starch accumulation in sensitive crops, Potassium Schoenite is virtually chloride-free.
Can Potassium Schoenite be applied through drip irrigation?
Yes, Potassium Schoenite is 100 percent water-soluble and is extensively applied through drip fertigation systems without clogging drippers.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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