In Part 1 of this series I talked about the basics of soil compaction and how soils are broken, and in Part 2 I discussed whether and how broken soils can be fixed. Today, in Part 3, we’ll look at how this information is relevant for people considering using the Silva Cell in their projects. Because… More
Root barriers have somewhat been relegated to the side what with all of the hullabaloo about the Silva Cell. This is a little sad to me, since root barriers have been an effective tool used to help maintain the integrity of sidewalks and other hardscapes for over 30 years. They are also an important… More
In Part 1 of this series I talked about the basics of soil compaction and how soils are broken. Today, I’ll look at whether broken soils can be fixed. Since soil compaction so often causes problems after construction, many scientists have studied the effectiveness of ways to avoid compaction or reverse it after it occurs…. More
Urban soils are typically inhospitable places for trees, other plants, and their oxygen breathing microorganisms. Construction equipment, grading, and even human foot traffic leave urban soils much more compacted than natural soils. Typically 40-55% of the volume in a healthy forest soil consists of pore space. This pore space consists of varying proportions of air… More
Uptown Circle, the centerpiece of an urban redevelopment project in the central Illinois town of Normal, was recently honored by the Illinois Chapter of the American Society of Landscape Architects at its annual Celebration in Chicago. Designed by Hoerr Schaudt Landscape Architects, the project received the President’s Award in the Urban category, the highest recognition… More
There’s more to street tree selection than just good looks (although of course we all have our favorites.) Rooting behavior, disease resistance, projected size and flower/fruit type are just a few of the factors that affect what we plant and where. Somehow we’ve still ended up with only a handful of trees species that are… More
I have a hard time thinking of too many people who would disagree that there is a joyful calmness to a forested path, a nature preserve, or a hillside of fall foliage. These scenes all have powerful visual and psychological impacts that make us feel more synchronous with the earth and… well, grounded. The trees… More
In the end, the core of all of our discussions about green infrastructure comes down to soil volume. Adequate soil volume is the seedling from which our particular variety of green infrastructure grows (literally and figuratively). It is what allows us to even consider the role that huge, mature trees and on-site stormwater management can… More
Cities provide uniquely challenging conditions for trees. Pollution, heavily compacted growing media, vandalism, and maintenance requirements all complicate the plight of the urban tree and compromise its ability to survive to maturity and make a meaningful contribution to its environment. Yet, cities need trees — desperately — to help reduce pollution, crime and speeding and… More
So, usually we’re talking about big trees on this blog. Today our partner Sarah K. Faiks, a sustainable landscape architect with the Kestrel Design Group, flips us on our ear and discusses small trees instead — and what bonsai has to teach us about urban tree planting techniques. The art and practice of bonsai has… More
By Albert Key While there is much empirical information on wind throw, ultimately, we do not know the exact stresses which wind puts on mature trees, as the only way to academically test wind throw is with young trees. A study that I worked on with Dr. Tom Smiley of the Bartlett Tree Laboratory generated… More
The Silva Cell portion of the Project 180 (Oklahoma City) Streetscape – Phase 3 began a couple of weeks ago. Installation Coordinator Pat Greeley was on site to conduct a contractor training and oversee the initial phase.
Soil. Stormwater. Sustainable Infrastructure.
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