Humus levels in grasslands are mostly determined by local climate, altitude and intensity of usage. In the lower regions of the intensively used Alpine foothills and the Waldviertel and Mühlviertel regions, where lighter soil dominates, the share of areas with humus levels under 4.5 % is highest at 26 and 23 percent.
This is in contrast to areas in the Prealpine region, High Alps and the higher areas of the Alpokalja, which often have humus levels of over 9 %: this share is between 26 and 42 percent in these regions.
Based on the these results, pH values should be kept in the optimal range to maintain and increase the productivity of grassland. Phosphor supplies and phosphor levels in staple feeds require increased attention, given the drive for increased quality. Potassium supplies are mostly sufficient to high. Humus levels depend on altitude, intensity of use and the type of soil.