German technology
Humic Substances Based Products
Humintech GmbH
Am Pösenberg 9-13
D-41517 Grevenbroich

Telefon: +49 2181 70 676 - 0
Fax: +49 2181 70 676 - 22
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HUMAGRA® NPK 10-0-3 + HA Brochure


HUMAGRA® NPK 10-0-3 + HA Liquid is an organomineral fertilizer which contains humic acids, nitrogen, and potassium. Beside providing these macronutrients to supplement plant nutrition, the product acts as a soil conditioner and plant growth stimulant. It is a permanent humic substance, which is relatively slowly decomposed by microorganisms of the soil. HUMAGRA® NPK 10-0-3 + HA Liquid can be used alone or mixed with most fertilizers.


HUMAGRA® NPK 10-0-3 + HA Liquid is obtained through alkaline extraction from German Leonardite (highly oxidized lignite), with addition of soluble nitrogen sources. Leonardite arises from the chemical and biological humification of plants and other organic matter, by biological activity and geological processes. This formulation provides a very high content of humic and fulvic acids and a high quantity of nitrogen and potassium.   


HUMAGRA® NPK 10-0-3 + HA Liquid provides positive fertilizing and soil-conditioning effects, specially in sandy and heavy soils. The product can be applied to all agricultural and horticultural crops, either directly to the soil or as a foliar spray.

  • Increases crop yield and quality
  • Supports the plant with different forms of nitrogen
  • Improves the soil structure and the water retention capacity
  • Increases and stimulates beneficial soil microorganisms
  • Enhances the soil cation exchange capacity (CEC)
  • Increases the effectiveness of fertilizers and reduces nutrient losses
  • Promotes root development
  • Increases nutrient uptake
  • Acts as a natural chelator for microelements in alkaline soils and increases their availability to plants
  • Decreases stress by drought and/or application of plant Treatments
  • Increases the germination of seeds
  • Reduces the residues of herbicides and toxic substances in the soils
  • Prevents nitrate leaching


In all crops
25-30 L/ha divided into several doses (1-2 kg/ha) during the season

Vegetables in greenhouses 
35-45 L/ha divided into several doses (5-10 L/ha) during the season

Horticultural fruit trees
35-45 L/ha divided into several doses (5-10 L/ha) during the season

Open field vegetables
25-30 L/ha divided into several doses (5-10 L/ha) during the season and at fertilizer application

Cereals, potatoes, legumes
25-30 L/ha divided into several doses (5-10 L/ha) during the season and at fertilizer application

Ornamental plants and tree nursery, turf grass, landscaping (in general)
35-45 L/ha divided into several doses (5-10 L/ha) during the season or 5 L/m3 during the preparation of substrates

Foliar application
0.700-1.5 L/1000 L water every two weeks during the season

UV protection
0.5% (1 L/200 L water/ha)

* This recommendation may be varied according to the soil characteristics and local conditions.

INHERENT COMPOSITION  (Typical values on basis Fresh Matter)

Potassium - Humates

18 %

Total Humic Acids 1/2

16 %

Humic Acid 1

14 %

Fulvic Acid 1

2 %

Potassium (K2O)

2 - 3 %

Dry Matter

22 - 23 %

Organic Substance

18 - 20 %

pH - value

9 - 11

Total Nitrogen

10 %

Thereof water soluble Nitrogen

9 %


1.12 kg/L

1 according to ISO 19822 / HPTA / AAPFCO / IHSS Analysis method 
2 according to CDFA  16 % / Colorimetric method 18 -  20 %
“All Humintech humic substances based products are analysed according to the HPTA test method (ISO 19822:2018) to determine the content of humic and hydrophobic fulvic acids. Most suppliers are using the more simple “colorimetric” analysis method to determine the humic and fulvic acid contents, but experience shows that, due to its inaccuracy, this method indicates higher contents and is not suited to identify non humic substances such as lignosulphonates. In order to maintain the highest quality standard, Humintech has therefore decided to use the currently best analytical standard for the determination of humic and fulvic acids within the scope of quality control.”


Humintech is a biotech company based in Grevenbroich, Germany. We are primarily focused on the research, development and industrial production of humic matter and humic acids for the agricultural sector.  Our products find further use in the feed, pharmaceutical and construction industry, in veterinary medicine and for ecological purposes such as water purification and soil decontamination.


Humintech GmbH

Am Pösenberg 9-13
41517 Grevenbroich / Deutschland 

Phone: +49 2181 70 676 - 0
Fax: +49 2181 70 676 - 22