A volcanic ash deposit of riolitic tuff, which has a high micro- and macroelement content and an advantageous structure. By mixing it into the soil, its ion-exchange capacity reduces soil acidity and, due to its particle size, soil binding. It...

The use of riolite tufa improves soil life, allowing healthier crops to be grown. It can also absorb 20-25% of water, which is beneficial in both drought and wet periods. It can increase yields by up to 5-10%. The volcanic ash content of riolite tuff...