From 1926 to 1952 he was professor at Lund University.
After returning he for a time took up a post in Lund University.
He studied political science and some other subjects at Lund University.
The same year, he was made honorary doctor at Lund University.
From 1963-1993, he was professor of plant ecology at Lund University.
He was a professor at Lund University and its rector from 1907 to 1909.
In 1968 he held a temporary position at Lund University.
During 2010 to 2011 he was the director of innovation at Lund University.
He held an honorary degree at Lund University since 1993.
It is used as a motto on the seal of Lund University.