In the "Will economic woes help or hurt the hearth industry?" thread, a couple people were talking about estimating firewood cords/acre: [quote author="kenny chaos" date="1226557969"][quote authorA very old rule of thumb, was two cords per acre of wood lot. The real issue is not as much about renewability as it is that Burning wood is carbon neutral.[/quote] Actually, the old rule one face cord per acre or three acres per cord.[/quote] I know that these are just generalizations, and there are a lot of factors other than amount of land that determine firewood content on a piece of property. My question is what is the time period (i.e. two cords per acre per year or ten years or what) for these estimates, and which of these estimates is the most accurate?