Nagarjuna SOP (Sulphate of Potash) is a premium chloride-free water-soluble fertilizer formulated to supply highly available potassium and sulphur to crops. It plays a critical role during fruit development and maturity stages by improving fruit color, size, taste, and shelf life.

Being low in salinity and free from harmful chlorides, it is ideal for sensitive crops such as grapes, fruits, vegetables, and plantation crops. SOP also enhances enzyme activity and protein synthesis due to its sulphur content, leading to better crop quality and stress tolerance.

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Technical Details

Product Type:
Water Soluble Fertilizer

Technical Composition:
Potassium Sulphate (SOP)

NPK Grade:
00-00-50

Nutrient Content:

• Potassium (K₂O): 50%
• Sulphur (S): 17.5%

Formulation:
Fully water-soluble crystalline fertilizer

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Mode of Action

• Supplies potassium for fruit development and quality improvement
• Provides sulphur for amino acid and protein synthesis
• Enhances enzyme activation and metabolic efficiency
• Improves sugar translocation and crop maturity

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Mode of Entry

• Foliar absorption
• Root uptake via fertigation

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Key Benefits

• Improves fruit size, color, and taste
• Enhances shelf life and market quality
• Chloride-free and safe for sensitive crops
• Strengthens plant stress tolerance
• Improves sugar accumulation in fruits
• Suitable for drip and foliar application

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Recommendations (Crops | Purpose | Dosage)

Fruit Crops | Fruit development and ripening | 5–10 g/L (foliar) or fertigation
Vegetables | Yield and quality improvement | 5–7 g/L
Grapes | Berry development and sweetness | 7–10 g/L
Field Crops | Grain filling and maturity support | 3–5 kg/acre (fertigation)

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PHI & REI (Safety Intervals)

PHI (Pre-Harvest Interval): Not applicable (fertilizer product)
REI (Re-Entry Interval): 4–6 hours after application or once foliage is dry

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Application Method

Apply through foliar spray or fertigation system after complete dissolution in water. Recommended for use during fruit development and maturity stages for best quality outcomes.