This is how you farm in the middle of the jungle. Slash and burn agriculture is a more sustainable way: cut down an area and burn it. By keeping the burnt nutrients from the trees, it enriches the otherwise sandy soil. They only use it for a few years, abandon it and move to a different area, and just after 8 years it looks like jungle again. Here you can see the first processes of creating a farm, including a thatched barn: you can see the new green palms that haven't dried and yellowed from the sun yet.