The solubility of Siam Rung Thai MAP™ is considerably enhanced by increase in water temperature, as shown in the following table.
| Water temperature (ºC) | 0 | 10 | 20 | 30 | 40 |
|---|---|---|---|---|---|
| Solubility (g/100g water) | 22.7 | 29.5 | 37.4 | 46.4 | 56.7 |
pH and EC
Siam Rung Thai MAP™ has a moderately low pH that remains almost constant at different concentrations.
| Concentration (%) | 0.1 | 0.2 | 0.3 | 1.0 | 5.0 |
| PH | 4.7 | 4.6 | 4.6 | 4.4 | 4.2 |
The electrical conductivity (EC) increases substantially when high concentrations of Siam Rung Thai MAP™ are used.
| Concentration (%) | 0.1 | 0.2 | 0.3 | 1.0 | 5.0 |
| EC (mS/cm) | 0.86 | 1.66 | 2.5 | 7.4 | 27.8 |
Application Recommendations
Nutrigation™
Due to its unique characteristics, SMR MAP™ can be applied through any irrigation system and on any growing medium. Unlike phosphoric acid, Haifa MAP™ is moderately acidic. Thus, it does not form corrosion on fertilizer pumps or irrigation equipment.
Compatibility
SMR MAP™ is compatible with most water-soluble fertilizers, except for fertilizers containing calcium (Ca++) or magnesium (Mg++).
To apply Haifa MAP™ in combination with calcium or magnesium fertilizers, use two fertilizer tanks. If the system includes only one tank, apply these fertilizers at different times.
Quantitative Nutrigation™
Each kilogram of Siam Rung Thai MAP™ in the tank provides 610 grams of phosphorus oxide (P2O5) and 120 grams of ammonium-nitrogen (N-NH4).
Example: from initial establishment to flowering, open-field grown tomatoes require phosphorus at a rate of 1.5 kg P2O5 per hectare per day. To provide this, apply Siam Rung Thai MAP™ at a rate of 2.5 kg per hectare per day. This will supply also 0.3 kg nitrogen per hectare per day. To complete nitrogen and potassium requirements, apply ammonium nitrate and Multi-K™ (potassium nitrate).
Proportional Nutrigation™
The phosphorus concentration in the irrigation water depends on the quantity of Siam Rung Thai MAP™ in the tank mix, and on the injection ratio. Use the following table to calculate the quantity of Siam Rung Thai MAP™ and the injection ratio needed to reach a given concentration in the irrigation water.
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