The bitter struggles between the white men and the Indians during the colonial period created animosities and prejudices which have overshadowed the beneficial contributions the red men have made to civilization. As plant breeders, the American Indians rank with the most skillful of the world. Take for instance, maize or Indian corn. There is nothing closely comparable to it known to botanists. It has been domesticated so long that its wild prototype is unknown. Maize, now, could not exist anywhere in the world without the aid of man. The Indians had all the varieties that are now known, such as dent, flint, sweet, early, late, pop, and other special sorts which are no longer grown. They had developed varieties that matured all the way from the tropics to the St. Lawrence River in Canada. The Indians also practiced a mixed culture such as corn, beans, and squashes all in the same hill; they had created a large number of varieties of beans (_Phaseolus genus_): the white, red, black, and spotted sorts now so commonly grown, and many others. 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. INDIAN VS. OLD WORLD CULTURE