Fertilizers
Stemma VIP Line
Acid NPK with magnesium
and micronutrients
Fertigation • Foliar
Stemma VIP is a line of NPK fertilizers characterized by a low pH, which allows for the gain of acid nutritional elements and reduces the chance of obstructions of the irrigation systems.
Stemma VIP line contributes to the reduction of the bicarbonates present in irrigation waters, allowing for the use of our formulas even in hard and alkaline-pH waters.
This product line is characterized by the absence of carbonates and other substances that are insoluble or dangerous for plants.
Composition % w/w
Physical and chemical properties
Composition % w/w
| Stema VIP | N-tot % | N-nit % | N-amm % | N-ur % | P2O5 sol in H2O % | K2O sol in H2O % | MgO sol in H2O % |
| 13-8-24+3+micro | 13 | 6 | 5.5 | 1.5 | 8 | 24 | 3 |
| 10-40-10+2+micro | 10 | 18 | 7.5 | 1.5 | 40 | 10 | 2 |
| 8-5-40+2+micro | 8 | 6.5 | 1.5 | – | 5 | 40 | 2 |
Microelements in “Stemma VIP Line”: B 0.01 – Fe EDTA 0.02 – Mn 0.01 – Mo 0.001 – Zn 0.002
Physical and chemical properties
| Stema NPK | Water solubility at 20°C (g/l) | pH (1% w/w aqu. sol.) | Electrical conductivity 1 g/l aqu. sol. (μS/cm) | Effect of 1 g/l of product on bicarbonates (*determined in medium hardness water) |
| 13-8-24+3+micro | 450 | 3.0±0.5 | 1500 | -40 mg/l HCO3–* |
| 10-40-10+2+micro | 440 | 3.0±0.5 | 1150 | -40 mg/l HCO3–* |
| 8-5-40+2+micro | 400 | 2.5±0.5 | 1400 | -40 mg/l HCO3–* |