How did the Colombian Exchange affect farming in the Americas?

The Columbian Exchange introduced exotic crops like corn ,white potatoes, sweet potatoes ,beans,tomatoes, peanuts and blueberries to Europe. Non-native grains like wheat,barley and rice became commonplace on American soil and increased the variety of crops that could be stored through the winter.

i think it is a system for harvesting crops more easily

c. it required that townships set aside land for public schools.