Typ pedologického válečku a jeho vliv na objemovou hmotnost redukovanou

Bulk density reduced (BDR) is an important parameter for evaluating the degree of soil compaction as well as for calculating the stock of chemical elements per unit area. Various designs of soil sample rings are used to collect intact samples, differing in height to diameter ratio, the volume of which is usually 100 cm3. With the start of the new cycle of the National Forest Inventory in 2021, there has been a change in the design of soil sample rings. The aim of our experiment was to verify whether an inconsistency of the measured values had not occurred because of this. During our experiment, 191 pairs of samples were taken to compare the Kopecky rings (diameter to height ratio 1.86) and so-called narrow tall rings (0.63). Furthermore, 40 pairs of samples were taken to compare the Kopecky rings and so-called narrow low rings (2.15). The statistical investigation showed that the BDR from the samples collected in the Kopecky rings does not differ significantly from the BDR obtained from narrow low or narrow high rings. The effect of ring design stayed consistent within individual groups of soil horizons. The effect did not manifest even in texturally differentiated groups of soils.