Certified Arborist case studies
Certified Arborist · Put your knowledge to work in context.
The ISA Certified Arborist credential is a professional certification administered by the International Society of Arboriculture. ISA describes its credentials as a way to help consumers identify qualified, knowledgeable tree care professionals - which is why the designation is commonly referenced in hiring, contracting, and municipal tree care specifications. The Certified Arborist case studies are 5 cases and about 6,445 words.
1Honey Locusts After Trenching, Fill, and Drought
A 0.4 ha municipal parking lot is being rebuilt around three 45 cm DBH honey locusts (Gleditsia triacanthos var. inermis) in a 3 m wide planting strip.
1,170 words, about 6 min2Twenty Red Maples Planted Into Compacted Clay
A developer plants twenty 60 mm caliper balled-and-burlapped red maples (Acer rubrum 'October Glory') along a new street in compacted clay loam. Holes were dug with a 45 cm auger and are the same width as the 55 cm root balls, with glazed, smeared sides and bottoms.
1,275 words, about 6 min3Codominant Silver Maple With a Cracked Union
A 90-year-old silver maple (Acer saccharinum) in a front yard has two codominant stems, 55 cm and 48 cm diameter, diverging at 4.5 m with a V-shaped union and included bark. A 40 cm longitudinal crack is visible in the union.
1,241 words, about 6 min4Chlorosis, Scorch, and a Herbicide Application in Parking Islands
Eight 12-year-old red maples in parking-lot islands are irrigated by drip for 20 minutes daily at 06:00. Three show interveinal chlorosis on the newest leaves with green veins, marginal necrosis, and about 20% dieback.
1,380 words, about 7 min5A Leaning White Oak Above a Playground
A 70 cm DBH white oak (Quercus alba) in a park leans 12 degrees toward a playground used by about 40 children per day; the playground edge is 8 m from the trunk and the tree is 18 m tall. On the tension side at the base there is a 20 cm Ganoderma applanatum conk and a 30 cm wide bark seam.
1,379 words, about 7 min