ISA Arboriculture
@ISArboriculture
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ISA is a worldwide professional organization dedicated to fostering appreciation for trees and to promoting the professional practice of arboriculture.
Atlanta, GA
Joined December 2009
Nominate your peers for the ISA Awards Program and honor those who have made significant contributions to the arboriculture industry! Nominations are open now until 3 March 2025. Click here to learn more and nominate: #ISANZ2025
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In preparation for development of the eleventh edition of the Guide for Plant Appraisal, a public review and comment period on the current, tenth edition, of the Guide is open until 28 February 2025. To learn more and access our comment form, visit
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The nomination period for the ISA Awards Program is open! Join us in Christchurch, New Zealand for the ISA 2025 Annual International Conference and nominate your peers for recognition. Nominations will close on 3 March 2025. Click here to learn more:
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Our January issue of Climbers' Edge is out now. As we look forward to the ISA 2025 NATCC in New Braunfels, Texas on 21-23 March, take a look back on our time in Washington D.C. during the ISA 2023 NATCC. Access this story here:
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This study explores a potential solution using a modified "pipe model" approach to estimate root cross-sectional area at varying distances from tree trunks:
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The newest issue of Tree-sources is out now! Learn more about the exclusive resources and content, educational benefits, and discounts on products that are all yours when you're an ISA member. We also have the latest list of CEU-opportunity webinars here:
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Urban development can put tree roots at risk, particularly during trenching and excavation. In this study, researchers revisited mature live oak (Quercus virginiana) trees five years after simulating trenching damage at varying distances from the trunk
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The Landscape Below Ground conference series has long been a cornerstone for advancing research on tree root growth and urban soils. In October 2023, the fifth conference in this series brought together 39 presenters from 9 countries to share insights
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The first 2025 issue of Tree-sources is out now. Start the year off preparing for the ISA Certified Arborist® exam with the Arborists’ Certification Study Guide, Fourth Edition! Learn more and view the latest list of CEU opportunity webinars here:
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In preparation for development of the eleventh edition of the Guide for Plant Appraisal, a public review and comment period on the current, tenth edition, of the Guide is open until 28 February 2025. To learn more and access our comment form, visit
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The January 2025 issue of Arboriculture & Urban Forestry is now available on our open access platform. Enjoy "Landscape Below Ground V: Introduction to a Special Issue" and other featured stories by clicking here:
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Check out the December 2024 issue of ISA Today here:
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Next October, we’re heading to stunning Christchurch, New Zealand for the ISA 2025 Annual International Conference! Visit our conference page for some New Zealand tourism highlights, hotel information, and stay updated with all the latest info:
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ISA would like to congratulate Samuel Ma on being named a True Professional of Arboriculture To view the full list of 2024 True Professionals of Arboriculture, visit
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The latest issue of Climbers' Edge is out now. Read the recap of the ISA 2024 LATCC in Bogotá, Colombia, and check out some preliminary info on our TCCs coming in 2025! Click here:
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The December issue of Arborist News is available to read now! Read "Rebrand and Programmatic Changes for the ISA Certified Arborist Municipal Specialist® Credential", and more:
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ISA would like to congratulate Dana Karcher on being named a True Professional of Arboriculture To view the full list of 2024 True Professionals of Arboriculture, visit
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Abstract submissions are open now until 5 January for the ISA 2025 Annual International Conference in Christchurch, New Zealand. Click here to submit yours: #ISANZ2025
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