Construction and Installation - Project Planning and Management for Ecological Restoration - page 154

FIGURE 10-3. A “tree spade” digging a receiving hole for a willow tree. More than two thousand translocat-
ed willow and cottonwood trees were placed on this site with a less than 1 percent mortality rate; the trees
were salvaged from a construction project upriver. (Photo by John Rieger.)
harvesters, seed drills, sod cutters). Restoration practitioners have conducted studies on the cali-
bration of equipment (St. John et al. 2008) and have evaluated the effectiveness of various types
of equipment used in the restoration industry. For example, in chapter 12 of The Tall Grass Resto-
ration Handbook , Packard and Mutel (1997) present a good discussion on the use of seed drills for
prairie restoration, which is also relevant for other types of grassland restoration.
The desire to have tasks done more easily has led to the invention of brush extractors de-
signed to uproot invasive woody weeds. The Weed Wrench™ (fig. 10-4), available from The Weed
Wrench Company in Oregon, and the Pullerbear™ tree and root puller, available from Pullerbear
in British Columbia, Canada, are excellent examples of this innovative drive.
Another innovative example, for planting woody cuttings on stream banks, is the “hydrodriller”
(Oldham 1989), originally developed in the late 1980s by the staff of the Kings River Conservation