Information Sheets

Grafic Recordings

Grafic Recording “Soil fertility & Climate Change” (2019)

Grafic recording of a daylong seminar held by Hans Unterfrauner about soil fertility and climate change, drawn by Robert Six.

Informations printed on coasters

Graphic summary of the issues „Soil Sampling”, „Nutrients“, „Phosphorus” and „Buffering Systems”.


It all depends on the right ratio!
Complex interaction, Ca, Mg, K, N, P, S, B, Mo, Fe, Mn, Zn, Cu

Soil Sampling

The basis of reliable  analysis  results!
Motivation, preparation, implementation, analytics.

Buffering Systems

…more than just a pH value!
Acidification, soil pH in water and in neutral salt, buffering systems, availability of nutrients, melioration.


Analysis and mobilization instead of fertilization!
Phosphorus: pools, mobilization, dynamic, conversion factors.

Information Sheets for Analytics

Water-soluble Elements

The water-soluble elements of a soil determine the substance concentration in the soil solution, the most important medium for plant nutrition …

Exchangeable Elements

Organic and mineral parts have loaded surfaces and attach so called cations. Under certain conditions these cations can be suppressed (= exchanged) …

Plant available Elements

Plant available elements are accessible to plants during a growing season …

Reserve Fraction/mobilizable Elements

The reserve fraction includes elements which become plant available through weathering processes within 10 to 15 years…

Phosphorus in the Soil

Studies as well as own research show that most of the agricultural used soils have got enormous reserves of Phosphorus. These reserves can be mobilized intentionally…

Information Sheets for Survey Programs

Basic Characterization

Is it necessary to buy fertilizer or are there enough mobilizable reserve substances in the soil? Why is the corn not growing or not growing as well as on comparable sites? The Basic Characterization analyzes the current nutrient supply and additionally the reserve substances and 5 phosphorus pools. With this survey program fertilizers can be saved and growth problems can be solved.

Current Nutrient Supply

The survey program Current Nutrient Supply analyzes the actual nutrient supply and helps to optimize fertilizing strategies. If the survey works out a shortage (macro nutrients and trace elements) the recommended input is declared. For this declaration the real differences of existing and required nutrient quantities are calculated and used, not the content classes.

Soil Expertise

For example you want to know if biogas residues sustainably damage your soils or if the wanted fertilization effect is accomplished. Or before you buy or rent a new field you want to know if you have to invest in these sites to reach your intended crop yield…