One woman remained in hospital yesterday in a stable condition.
Mr Amundsen's former employer and owner of Dreamfields Farm, Bruce Woods, said news of the death came as a shock.
Mr Amundsen worked as an assistant to the dairy farm manager for two years before moving to another farm.
"We always got along well with him. He was pleasant and I always found him very cheerful and wanting to learn all the time," Mr Woods said.
Meanwhile police are praising the selfless actions of the 25-year-old driver of the second ute involved in the crash.
"The collision caused logs to fall from the fully laden truck, causing serious damage to his vehicle and narrowly missing the cab of the vehicle," police said.
They said the driver immediately began assisting other victims at the scene.
An investigation continues.