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mayans also grew beans, squash, avocados, pears, sweet potato's, guava, chili peppers, papayas and tomatoes. Mayans used a farming technique called milpa,also known as the slash and burn technique.the Mayans would burn down the land that was covered and the cut down the remaining foliage. This technique posed a problem because the land wouldn't last very long. The Mayans cycled through different areas to keep a stable farming.
The Mayans also were skilled at mathematics; they created a numerical system, based upon the numeral 20 (as opposed to our own, which is based on the number 10). Furthermore, they independently developed the concept of zero and positional value, even before the Romans did.