Nutrient Synergy and Agronomic Benefits
Potassium Nitrate pairs nitrate nitrogen (NO3-) with potassium (K+). Because nitrate is an anion that promotes cation uptake, it accelerates potassium absorption through root hairs and leaf cuticles far more efficiently than sulfate or chloride salts.
Being completely free of chloride and sodium, it is ideal for salinity-sensitive fruit and vegetable crops.
- Fruit enlargement: Drives rapid carbohydrate translocation from leaves to developing fruits, tubers, and pods.
- Quality enhancement: Enhances brix sweetness, uniform skin coloration, rind strength, and post-harvest shelf life.
- Frost & drought resistance: Regulates stomatal conductance and osmotic cell turgor during adverse weather extremes.
- Chloride-sensitive crops: Highly recommended for grapes, pomegranates, bananas, potatoes, tomatoes, and floriculture.
Fertigation and Foliar Spray Best Practices
Potassium Nitrate dissolves rapidly and completely in irrigation water without leaving insoluble grit that could clog drip emitters.
Applying during fruit-filling and tuber-bulking stages aligns fertilizer delivery directly with peak crop potassium requirements.
- Drip fertigation: Inject 2 to 4 kg per acre per fertigation round during fruit sizing, flushing lines with clean water afterward.
- Foliar spray: Dissolve 5 to 10 grams per liter of clean water (0.5% to 1.0% concentration) and spray during early morning or late afternoon.
- Compatibility: Highly compatible with most soluble agrochemicals; avoid mixing directly with highly concentrated acids in stock tanks.
Official source
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Department of Fertilizers ↗Related on KisanPe
Common questions
What nutrients are supplied by 13-00-45 fertilizer?
It supplies 13% Nitrate Nitrogen (NO3-N) and 45% water-soluble Potash (K2O), completely free of chloride.
Why is nitrate nitrogen superior during fruit development?
Nitrate nitrogen is immediately available for plant uptake without requiring microbial soil conversion, and it actively stimulates potassium absorption.
When is the optimal time to spray 13-00-45 on fruit crops?
The best stage is during fruit set, fruit sizing, and maturation to maximize fruit weight, color, and sugar accumulation.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More Fertilizers & Crop Nutrition guides
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