As I have been double-digging beds in my garden here in Swaziland, I have encountered lots of trash.
Trash in the garden, you say?
Why, yes, because in rural Swaziland there is no trash pickup service, so people either burn and/or bury their trash.
My family first burns the trash in pits dug throughout the yard. Once the pit is full of non-burnable trash, it will be covered. Maybe a garden will be started over it a few years later.