Indian Tillage
The Indians were able to clear fields, of several hundred acres in extent, without the aid of metal tools, using fire as their chief agent. Trees, too large to be cut with their stone hatchets, were killed either by building a fire at the base or by girdling the bark. The trees in dying furnished fire wood for domestic use. Planting began among the dead trees wherever enough loose dirt could be scraped together to make a hill for seeding. In the course of time the fields became entirely free from forest growth. These fields were cropped in most cases until their fertility was exhausted and then abandoned. If there was no more available fertile land in the vicinity, the tribe moved to a new location. The early white settlers on the Atlantic Coast found many of these abandoned clearings. Because of their unproductiveness they were called "poisoned fields."
The Indians had only the crudest sorts of farming tools. Near the coast, sea shells were the most efficient implements they possessed. The fresh-water clam-shells came next in usefulness. Where these natural scrapers were not available, pointed sticks, and pieces of flat rock served the purpose. One writer describing the Illinois Indians' method of farming says:
This tillage consists in breaking up just the surface of the earth with a sort of wooden instrument, like a little pickaxe, which they make by splitting the end of a thick piece of wood, that serves for a handle, and putting another piece of wood, sharp pointed at one end into the slit. This instrument serves them instead of a hoe or spade, for they have no iron tools.