Grinding soil aggregates at the Chemical Laboratory of the University of Technology and Humanities in Bielsko-Biała, Poland. Working on master`s degree. Soil aggregates: various shapes and sizes of clods of soil with different durability that arose in the soil as a result of joining individual mineral grains
<a href="//commons.wikimedia.org/w/index.php?title=User:Burczas&amp;action=edit&amp;redlink=1" class="new" title="User:Burczas (page does not exist)">Łukasz Bury</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>