What is an Acre? - Ask a Farmer: America's Heartland
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L'ACRE, c'est quoi ? (définition, aide, lexique, tuto, explication)
The acre is a unit of land area used in the imperial and US customary systems. It is traditionally defined as the area of one chain by one furlong, which is exactly equal to 1⁄640 of a square mile, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare.