Nutrient composition and synergistic uptake mechanism
The combination of nitrate nitrogen and soluble potash creates positive ionic synergy within plant roots and foliage.
- Nitrate Nitrogen (13% NO3-N): Readily assimilated without converting in the soil, promoting healthy cellular expansion.
- Potash (45% K2O): Regulates stomatal aperture, activates transport enzymes, and translocates photosynthates into fruits and grains.
- Synergistic ion transport: Negatively charged nitrate anions enhance the absorption of positively charged potassium cations.
- Completely water-soluble formulation: Leaves zero insoluble residue, preventing clogging of drip emitters and spray nozzles.
Target crops and optimal growth stage application
Potassium Nitrate is applied during critical reproductive phases when crop potassium demand reaches its peak.
- Horticultural fruits (Grapes, Pomegranate, Banana, Citrus): Enhances fruit diameter, uniform colour break, and brix sweetness.
- Vegetables (Tomato, Chilli, Capsicum, Onion): Prevents fruit cracking, improves firmness, and extends post-harvest shelf life.
- Field and cash crops (Cotton, Sugarcane, Wheat): Strengthens stalk strength, improves boll filling, and enhances drought resistance.
- Application timing: Apply during flowering, berry setting, and fruit enlargement stages for maximum nutrient efficiency.
Application techniques and mixing precautions
Apply via drip fertigation systems or as a foliar spray during early morning or late evening hours. Avoid applying in strong direct sunlight to prevent leaf scorching. Potassium Nitrate is broadly compatible with most neutral agrochemicals and water-soluble fertilisers governed under the Fertilizer (Control) Order (FCO).
Official source
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Department of Fertilizers (Govt of India) ↗Related on KisanPe
Common questions
What is the nutrient grade of 13-00-45 fertiliser?
It contains 13 percent nitrate nitrogen and 45 percent soluble potassium oxide (K2O), with zero phosphorus.
Why is Potassium Nitrate preferred during the fruiting stage?
Potassium is essential for sugar synthesis, cell turgor, and fruit enlargement, while nitrate nitrogen supports ongoing plant vigor.
Can 13-00-45 be applied through drip irrigation?
Yes, its complete water solubility makes it ideal for precision drip fertigation without risk of emitter blockage.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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