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Material Safety
Data Sheet

Federal Biological
Research Centre for
Agriculture and Forestry

Bio-Data GmbH
Laboratory for Ground,
Environment and Food

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Printable version
Powhumus WSG-85® is a concentrated substance and a 100% water soluble high-quality plant growth stimulant and soil-conditioner and can be applied for agricultural and horticultural plants, fruit trees, ornamental plants, turf and pasture for soil and foliar application. It is a permanent humic substance and can not be degraded that fast by the microorganisms of the soil. It can be used together with or without most fertilizers and micronutrients.


Powhumus WSG-85® is gained through alkaline extraction from German highly oxidized lignites (known as Leonardite). It arises at the chemical and biological humification of plant and organic matter and by the biological activity of micro-organisms. They provide a very high content of humic and fulvic acids and natural biologically active trace elements.


Powhumus WSG-85® is a growth stimulant and soil conditioner especially for sandy and clay soils. As a crystalline granule, it can be transported easily. It can be applied to all agricultural and horticultural plants. It can enhance the performance of fertilizers and reduces input-costs.

Direction For Use:

Powhumus WSG-85® is 100% water soluble and it will not block the nozzles of irrigation systems, as the particle size of the suspension is <100 microns. It is suitable for direct application or you also can mix it with soluble fertilizer formulations like soluble NPK, DAP or urea and also with herbicides. It can be applied by sprinkler, drip or surface irrigation systems. First mix the recommended amount with pure water and fill it in the mixing tank. We recommend a miscibility test before the first application of a mixture.

Soil Application (Trickle/ Drip Irrigation):
Apply 4-6 kg/ha per year, on sandy soils 6-8 kg/ha per year. It is recommended to use it more frequently but in rather small application rates. It can be mixed with other soil amendments like peat, sand or compost to enhance the biological activity with 500-1000 g/m3. In using surface systems, mix the recommended amount in a depth of up to 10 cm.

Foliar application (Boomspray/Sprinkler/ Overhead Irrigation):
Use a concentration of not more than 0.025% (250 g/1000 L) and mix it, if you like, to foliar fertilizers or to pesticides 2-4 times per crop.

Seed treatment:
Blend the seeds with a 0.01-0.03% solution, pH 7-7.5, the best at 20C for 8-10 hours. Per 100 kg seeds apply 10-20g of Powhumus WSG-85®.

UV protection:
Mixture of 0.1% (400g in 400l water/ha and 1m crown height).

Powhumus - 100% Watersoluble Powder

Composition & Properties

Potassium Humates:


Potassium(K2O dry matter):




N (organic):





approx. 10%
at production




approx. 0.55 kg/L


400-600 meq/100g

Particle size of Insol. Cont.:

<100 Microns

Solubility in water:



dark brown

Product Type

Powhumus - 100% Watersoluble Powder

Form Of Delivery

1kg Carton Box
10kg Carton Box
25kg Paper Bag

Other forms of delivery
are available on request.

Powhumus - 100% Watersoluble Powder