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Maine low-bush blueberries grow wild in the rocky, acidic soils of coastal Maine. The blueberries are difficult to cultivate, but they can be managed where they grow naturally for high production. Native Americans realized this, and used controlled burning to manage the blueberry fields and keep out competition from weeds and trees. Today, blueberry farmers continue to use mowing and herbicides in addition to burning to keep the fields clear. If left to their own devices, the blueberry fields would eventually grow up in woody plants and trees, competing with the blueberries. Low-bush blueberries are high in anti-oxidants and are a smaller, drier berry than the high-bush varieties, and as a result they are commonly used in baked products, such as blueberry muffins.