Fertilizers
Stemma Hum
Liquid humic acids
Foliar • Fertigation • Organic Farming
Stemma Hum is an organic liquid fertilizer with high content of humic acids from leonardite. Humic acids improve cation-exchange capacity in the soil and increase the availability of nutrient elements for plants.
By foliar spraying, the product increases the permeability of cell membranes allowing a better absorption of nutrients.
Stemma Hum is ideal in sandy soils, saline soils, with high pH or lack of organic matter.
Rate of use
Composition % w/w (equivalent to % w/v at 20°C)
Rate of use
Foliar: All the crops 20 – 40 l/ha
Fertigation: All the crops 80 – 120 ml/hl
Composition % w/w (equivalent to % w/v at 20°C)
| Total humic extracts | 13% w/w |
| Humic acids | 12% w/w |
| Fulvic acids | 1% w/w |
| Organic nitrogen (N) on dry matter | 1.5% w/w |
| Potassium oxide (K2O) soluble in water | 7% w/w |
| Organic matter | 15% w/w |