What ancient technique used to grow crops on hillsides or mountain tops?
Terracing was (and in some cases still is) used to grow crops on hillsides and mountains.
Food crops that benefit from natural fertilizers and biological controls are examples of ancient types of crops, fertilizers and pesticides. Specifically, cereals, corn and rice are examples of ancient food crops. Compost can serve as an example of an ancient natural fertilizer. In fact, one of the first written sources on composting comes from the ancient Roman civilization. Proper soil aeration and irrigation systems may serve as examples of ancient biological controls.
The Ancient Egyptians did many things with their crops. With many of them, such as wheat barley, beans, onions, and others were used for cooking and food. But there were also some crops that were used for other purposes, such as flax, which was made into linen, and helped make clothing. The Egyptians had built a shadouf to increase their production of crops.