 In 1917, he became a chairman of the Finnish Literature Society (Suomalaisen Kirjallisuuden Seura).Krohn was a co-founder of the magazines "Virittäjä" (1896) and "Finno-ugrische Forschungen" (Finno-Ugric research) together with Emil Nestor Setälä (1901).He was also famous for his 'historical-geographical' approach to comparing folklore texts.