Fertilizers
Calstem Line
Acid water-soluble fertilizer with calcium
Fertigation • Foliar
Calstem is a line of fertilizers formulated in water-soluble powder with acid reaction. Calstem is distinguished from any other water-soluble NPK fertilizers because in addition to nitrogen, phosphorus, potassium and microelements. It also provides an important amount of assimilable calcium, not easy to integrate in an acid fertilizers.
The considerable acidity of Calstem fertilizers pH 3.0 ± 0.5 improves solubilization and availability of the mineral elements. They also help to keep the fertigation systems clean, avoiding insolubilization and precipitation of the mineral elements.
Green Has Italia has created this specific line of water soluble NPK to fully and effectively feed crops throughout the production cycle, by providing the necessary fertilizing elements at each stage. Using a single product.
Composition % w/w
Physical and chemical properties
Composition % w/w
| Calstem Line | N-tot % | N-nit % | N-amm % | N-ur % | P2O5 sol in H2O % | K2O sol in H2O % | CaO sol in H2O % |
| Calstem 14-11-22+8CaO+micro | 14 | 10 | – | 4 | 11 | 22 | 8 |
| Calstem Bloom 13-35-5+8CaO+micro | 13 | 5 | 4.5 | 3.5 | 35 | 5 | 8 |
| Calstem Fruit 10-18-27+6CaO+micro | 10 | 8 | – | 2 | 18 | 27 | 6 |
Microelements in “Stemma Calstem Line”: B 0.01 – Fe EDTA 0.02 – Mn EDTA 0.01 – Mo 0.001 – Zn EDTA 0.002
Physical and chemical properties
| Calstem Line | Water solubility at 20°C (g/l) | Electrical conductivity 1 g/l aqu. sol. (μS/cm) | Effect of 1 g/l of product on bicarbonates (*determined in medium hardness water) |
| Calstem | 420 | 1400 | -80 mg/l HCO3-* |
| Calstem Bloom | 350 | 1150 | -80 mg/l HCO3-* |
| Calstem Fruit | 300 | 1000 | -50 mg/l HCO3-* |