I have some idle land that I was thinking about planting some trees for firewood. The land is sandy that drys out in the summer. I read recently that it takes 7.2 acres of properly forested managed land to heat 1000sq. ft. of home every heating season in my area. In other words someone with a 1350 sq.' home would only need 10 acres of land to heat their house. What it didn't say is what kind of trees are the most efficent for firewood. Anyone practice this?