Who showed the Pilgrims how to fertilize the soil on their farms and helped them establish relations with the chief of the local Wampanoag Indians?

Squanto, a Patuxet Native American, played a crucial role in helping the Pilgrims by teaching them how to fertilize the soil using fish as a natural fertilizer. He also facilitated relations between the Pilgrims and the local Wampanoag chief, Massasoit, which was vital for the settlers' survival and integration into the community. His guidance and knowledge were instrumental in ensuring the Pilgrims' early success in the New World.