Dense understory of dogwood and hop hornbeam in a 15-acre farm woods along the east side of Watershed No. 172, U.S. Soil Conservation Research Station. As shown in the foreground, all the dogwood and other less desirable trees in the understory were removed from the south half of this tract. This work was done in 1944 and the area underplanted with tulip poplar in the spring of 1945. It is planned to make openings of various sizes in the uncut portion of the stand to determine the size of openings necessary for natural regeneration of tulip and other desirable species. Item #5272