Reference Projects
Greenhouse Trials at Al Khalediah Farm, Saudi-Arabia
In a greenhouse experiment at the Al Khalediah Farm, Tebrak, Saudi-Arabia, the effect of Geohumus was tested on the growth of 2 different agricultural crop plants (Sorghum, Rhodes grass) under 3 different irrigation schemes: 'excessive' (= 5 mm water/day), 'optimal' (= 3.75 mm water/day) and 'reduced' (= 2.5 mm water/day). The test soil was a sandy soil taken from the Riyadh area.
Increase of sorghum biomass due to Geohumus amendment under 3 different irrigation levels
Increase of sorghum and rhodes grass biomass due to Geohumus amendment under 3 different irrigation levels
With the use of Geohumus
- plant growth was accelerated and stimulated independent of the irrigation level
- up to 43% more plant biomass was produced
- considerably less leakage water as up to 31% of the irrigation water was saved
Plant heights of sorghum subjected to differentiated irrigation and supplemented with 0 (left) and 1% Geohumus (right).
Plant height of Rhodes Grass subjected to differentiated irrigation and supplemented with 0 (left) and 1% Geohumus (right).
Project partner
National Research Centre for Agriculture
Dr. Habeeb, Scientist Al Khalediah Farm
Hisham Al-Tonobey, Managing Director
Dr. Mohammed Ali Bob, Plant Protection Specialist
Justus-Liebig-University Giessen
Prof. Dr. Hans-Georg Frede, Soil Scientist and Director
Dietmar Seidel, Geographer David Windhorst, Agriculturalist