Conversation so far:
What is the pioneering co-op?
He took a leading part in developing agricultural co-operation.
what did he do?
which he had learned from isolated American farmers, taking account of Scandinavian models of co-operation and the invention of the steam-powered cream separator.
What were the scandinavian models?
CANNOTANSWER.

Question: how did he use all that information?
Self-contained rewrite: how did Horace Plunkett use all the information from the Scandinavian models of co-operation?