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Selected cut-stump (Cut_surface) and basal frill (Basal_frill) treatments were tested on Eucalyptus macarthurii cut stumps that had previously been coppiced multiple times. Treatments included the application of herbicide (triclopyr as an amine salt, 360 g L−1), either to the cut-surface or to a basal frill (cuts made through the bark and into the cambium at the base of the tree). These treatments were integrated with non-chemical control methods, where seedlings were planted either between each stump row or within the row, to determine whether such treatments could further reduce the level of coppicing. Stump mortality for both the Basal_frill and Cut_surface treatments were equally effective, with 87% of the stumps killed when assessed at 14 weeks following initial treatment. No significant treatment differences were detected for the various growth variates of the stand at rotation end (stocking, basal area and volume). This can be attributed to a lack of competition from any coppice regrowth due to good control on each occasion. As there were no significant differences between the treatments, the Cut_surface treatment would be preferable due to the lower overall costs. However, for this method to be most effective, it is important that the herbicide be applied to the cut-surface of the felled tree within one day of felling. This may pose a safety issue, especially with mechanised felling of a stand. Further research on extending the period for application to the cut-surface could be beneficial. However, if reduced herbicide use is a prerequisite, coppice regrowth can be manually removed. [ABSTRACT FROM AUTHOR]

In South Africa, commercial eucalypt stands may be regenerated through the stepwise reduction of coppice shoots following felling. The development of secondary coppice regrowth following these reduction operations results in competition with the remaining stems, possibly resulting in a reduction in growth. Currently, secondary coppice regrowth is controlled manually, or through spraying with glyphosate at 0.6% when ca. 0.75 m in height. No research has been conducted to determine whether alternative rates and/or timing of application are possible or cost-effective. In 2006 a trial was implemented in Zululand, South Africa on a recently coppiced stand ofEucalyptus grandis×Eucalyptus urophyllaso as to optimise rates of glyphosate application (0.6%, 1.2% and 1.8%) for the control of secondary coppice regrowth at various heights (0.5, 1.0 and 1.5 m). Tree and secondary coppice regrowth variates were measured annually until rotation-end (9 years, 3 months). The volume of herbicide used, the number of occasions each treatment was sprayed and associated costs were combined to provide an indication of the most cost-effective treatment. Although there were no significant differences in final coppice yield for the various rates of glyphosate and timing of application (as assessed by the size of the secondary coppice regrowth) tested, treatment efficacy in terms of treating secondary coppice regrowth increased with an increase in the rate of glypho- sate applied (0% < 0.6% < 1.2% < 1.8%), especially when treated at either 1.0 or 1.5 m in height. The use of glypho- sate, irrespective of rate and/or timing of application (as assessed by secondary coppice regrowth height), proved to be more cost-effective compared with manual control or the spraying of the secondary coppice regrowth at 0.75 m height with 0.6% glyphosate. The most cost-effective treatment was 1.2% glyphosate applied when the secondary coppice regrowth was 1.5 m. If reduced herbicide use is a major criterion within a company portfolio, then the secondary coppice regrowth can be manually removed when 1.5 m. [ABSTRACT FROM PUBLISHER]

Archaeological heritage is part of a global identity; the need to preserve this heritage is important, not only to the local communities in which it is present but also to national and international communities. In recent years, digital recordings of monuments and buildings have provided significant contributions in the preservation, presentation and dissemination of cultural heritage. Digital recording of cultural heritage is a multidimensional and complex process: not only does it require researchers to address the problem of 3D digitisation of the monuments but also other aspects of handling this new digital content, such as management, representation and reproduction. Various techniques have been proposed and different technologies have been developed: some based on laser scanning, others on photogrammetric techniques, some using simple empirical methodologies and others based on imaging techniques. However, these techniques focus on cultural heritage assets which are still in existence. For lost, destroyed or damaged heritage, all that remains in a visual context are archived images. We investigate the use of photogrammetry on archived images, to attempt to create 3D reconstructions of lost heritage assets. [ABSTRACT FROM AUTHOR]