2013. 02. 07..

In 1986, the company known then as Észak Magyarországi Kőbánya Vállalat (Northern Hungarian Quarrying Company) commissioned the Debrecen University of Agricultural Sciences with carrying out research into the agricultural applications of rhyolite tuff. As a renowned expert in Hungary, the lion’s share of the work was performed by Dr. Mihály Köhler.

Based on experiments concluded by the university – in cooperation with 12 research institutes and several producers –, rhyolite tuff received the permit from the Ministry of Agriculture for applications related to glass- and plastic greenhouse cultivation, ploughlands and horticultures, plantations, lawns, grapevine- and tree nurseries, and cultivation materials in 1993.

Since 1988, all branches of Hungarian agriculture have been characterised by decline – especially with regard to livestock breeding, which caused a downturn in fertilizer production. Consequently, the role of natural mineral matters – rich in macro-, micro- and trace elements – is highlighted. These are vital for soil and plants, and are therefore highly needed for producing healthy and wholesome foods.

The successful application of rhyolite tuff grind in 0/5 and 0/12 mm particle sizes is feasible for the following soil types, in the following quantities:

• 0/5 mm particle size for sandy soils, in a quantity of 2-3 kg/m2;
• 0/5 mm particle size for clay soils (0-10% clay content), in a quantity of 0.5-1 kg/m2;
• 0/5 and 0/12 mm particle size for clay soils (clay content over 10%), in a quantity of 2 kg/m2;
• for plantations, depending on the size of the planting pit, in a quantity of 5-15 kg.