The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
Godelier observes that big changes in his fieldwork started to occur when he began to map the gardens of the Baruya. The kind of changes I think he was referring to was the changes need it to adapt the soil to keep producing good crops in this fieldwork. That is why he mapped the gardens of this place.
That is the reason why lived for a while with the native people of New Guinea. He lived and worked side by side with them. He spent months doing this. He observed and studied the soil to grow taro and sweet potato, two important crops in New Guinea. This way he also learned many new things about the forest, their culture, history, traditions, and their ancestors. But the big lesson was on agriculture.
The film was directed by Allison and Merek Jablonko, and the official title of the film is "To Find the Baruya Story: An Anthropologist At Work with a New Guinea Tribe."
