Background
He was born in Sparbu, a son of farmer and politician Hans Ystgaard and Kathrine Birgitte Steinfjord.
He was born in Sparbu, a son of farmer and politician Hans Ystgaard and Kathrine Birgitte Steinfjord.
He was appointed professor at the Norwegian College of Agriculture from 1951. Among his contributions is the development of the new cheese type called Jarlsberg cheese.