I understand the importance of trees in pasture land, but I'm talking about the square yellowish areas that look like the crop has just been harvested, leaving only the short and dry straw stumps.
Holmes, you apparently aren't talking about regular Northern European trees. They hardly never grow taller than 50 metres. Our farmers back then before the wars used to build their log houses by themselves, just the man felling trees and his horse pulling the logs to the yard, all during one winter. Of course it had to be done in their "spare time" when the local patron didn't need their services.