Bioturbation
A major re-evaluation of soil formation and the role of biota commenced in the 1980s, as soil-geomorphologists began to re-evaluate Charles Darwin's and Nathaniel Shaler's early ideas on the role of bioturbation in soil formation. There is now ample evidence to support Darwin's conclusions, and in many areas biota that burrow in soil are major agents of pedogenesis.
Read more about this topic: History Of Soil Science