Urban forestry and arboriculture has changed quite a bit over the last 100 years.
Many old practices like cavity filling and wound painting are gone for good. Oftentimes, though, we can learn from the old-timers, like Theodore Wirth.
Wirth was appointed Superintendent of Parks in Minneapolis in 1906 and was instrumental in creating this "City of Parks".
In this photo we see Wirth (far left) and other Park Board Commissioners, posing with bare-root American elms.
Fast-forward 100 years to 2010 and we are applying pruning practices from this bygone era to trees in the 21st Century.
Craig Pinkalla, arborist with the Minneapolis Park & Recreation board, stands next to a Princeton American elm he's just finished pruning at Fort Snelling.
Since his days maintaining the urban forest in the City of Milwaukee, Craig has been a strong advocate of giving young trees a chance to become mature, productive shade trees.
In a sense, we've gone "back to the future."