Magnesium Nitrate provides 9.6% Mg and 11% nitrate nitrogen — the most readily available form of magnesium for foliar and fertigation applications. Magnesium is the central atom of the chlorophyll molecule and is essential for photosynthesis, energy transfer and enzyme activation.
Deficiency causes interveinal chlorosis (yellowing between veins while veins remain green) starting in older leaves. Heavy potassium application antagonizes magnesium uptake, making Mg correction particularly important in high-K grape and potato programmes.
Preferred over Magnesium Sulphate for foliar application due to higher solubility, lower phytotoxicity risk and absence of sulphate crystallization on leaf surfaces at high concentration.
| Nitrogen (N) — Nitrate | 11.0% min |
| Magnesium Oxide (MgO) | 16.0% min |
| Magnesium (Mg) | 9.6% min |
| Chloride | <0.01% |
| Water Solubility | ≥700 g/L at 20°C |
| pH (1% solution) | 5.0–7.0 |
| Moisture | 0.3% max |
| Colour | White crystalline |
| Foliar Spray | 3–5 g per litre |
| Drip Fertigation | 3–5 kg per acre per application |
| Correction Program | Every 7 days, 3–4 applications |
| Prevention | Alternate with K-fertilizers in drip programme |
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