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AS 2303 PART 1. A SHORT INTRODUCTION

Posted on 28 August 2019 in General Quality Issues

The new Australian Standard for trees was first released in 2015 then revised, upgraded and re-released late last year as AS 2303:2018. Here is a quick run-down.... Keep reading

AS 2303 PART 2. ASSESSING FOR CONFORMITY

Posted on 28 August 2019 in General Quality Issues

A logical approach to assessing trees against AS 2303 was outlined in the Outreach tour recently conducted by Western Sydney University. Here is the recommended procedure.... Keep reading

AS 2303 PART 3. THE MATTER OF BALANCE IN TREES

Posted on 28 August 2019 in General Quality Issues

While most criteria found in AS 2303 mirror those found in NATSPEC, even if at times they have been relaxed a little, the one area where there has been significant change is in the application of the criterion for tree stock balance.... Keep reading

AS 2303 PART 4. HOW TO SECURE CONFORMING TREES

Posted on 28 August 2019 in General Quality Issues

There is no externally audited accreditation scheme available in Australia that can be applied as a guarantee that all trees to be supplied by any given grower conform to the new standard. So, how to go about it?... Keep reading

Root Barriers – Where to put them?

Posted on 19 May 2017 in Planting/Establishment

Tree professionals are charged with the task of ensuring that the trees installed into our urban landscapes have the resources they need to thrive and be safe for the long-term. But, they are also frequently asked to install root barriers so that the developing roots will not adversely impact on nearby engineered structures.... Keep reading

Estimating the Likely ‘Diameter at Breast Height’ of Mature Trees

Posted on 19 May 2017 in Planting/Establishment

Diameter at Breast Height (DBH) is an important descriptor of tree size and bulk. When making decisions in a number of situations, it is important that we can estimate what the DBH might be when the tree has matured.... Keep reading

Estimating Soil Volume Needs of Trees in Urban Situations

Posted on 19 May 2017 in Planting/Establishment

Urban soils are generally disturbed, often compacted, and the soil chemistry is commonly less than ideal – so it is often not much use to trees. However, in urban situations the amount of soil trees can access is critical to their long-term success. If existing soils are not suitable (or not available), we need to provide some that are.... Keep reading

Watering newly-planted trees

Posted on 19 May 2017 in Planting/Establishment

When you invest in new trees, you don’t just want them to survive – you want them to thrive. Of course, new trees need water and most short-term problems are linked to inadequate, excessive, or inefficient watering.... Keep reading

Field Guide for Watering Newly-Planted Trees

Posted on 18 May 2017 in Planting/Establishment

The following table gives suggested water application rates, frequency, and duration based on the best information available. It’s important to remember that these and actual water needs will vary according to a range of site conditions and species. Please also remember these suggested rates are broad estimates only. Always carefully monitor the trees in your project(s), paying particular attention to drainage and leaf droop, and vary as needed.... Keep reading

Where Should You Put The ‘Root Crown’?

Posted on 1 December 2015 in Planting/Establishment

Correct placement of the ‘root crown’ is essential for the long-term success of your trees.... Keep reading