The farmer does not attempt to take all the fertility out of the land in the harvest of one bumper crop.

He handles the field so that it will produce profitable crops every season.

He fertilizes the soil and tills it so as to add to its productive power.

Similarly, our forests should be worked so that they will yield successive crops of lumber year after year.
Lumbermen who own forests from which they desire to harvest a timber crop should first of all survey the woods, or have some experienced forester do this work, to decide on what trees should be cut and the best methods of logging to follow.

The trees to be cut should be selected carefully and marked.