Christopher Morhart
University of Freiburg
16Publications
5H-index
115Citations
Publications 16
Newest
Published on Mar 29, 2018in Forests 1.96
Lars Sprengel , Dominik Florian Stangler3
Estimated H-index: 3
+ 2 AuthorsHeinrich Spiecker21
Estimated H-index: 21
Intensive artificial pruning of trees increases the proportion of high-value timber but simultaneously reduces the crown and consequently the capacity to assimilate photosynthates. Here, midterm effects of two intensive pruning treatments, a classical and a selective approach, on radial growth dynamics at different stem heights is comparatively analyzed for the broadleaved tree species sycamore (Acer pseudoplatanus L.) and wild cherry (Prunus avium L.) at a site in the upper Rhine valley in sout...
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Published on Jun 1, 2018in Gcb Bioenergy 5.42
M. Nahm11
Estimated H-index: 11
(University of Freiburg),
Christopher Morhart5
Estimated H-index: 5
(University of Freiburg)
2 Citations Source Cite
Published on Jul 13, 2017in Remote Sensing 3.41
Elena Rosskopf1
Estimated H-index: 1
,
Christopher Morhart5
Estimated H-index: 5
,
M. Nahm11
Estimated H-index: 11
Information about the availability of solar irradiance for crops is of high importance for improving management practices of agricultural ecosystems such as agroforestry systems (AFS). Hence, the development of a high-resolution model that allows for the quantification of tree shading on a diurnal and annual time scale is highly demanded to generate realistic estimations of the shading dynamics in a given AFS. We describe an approach using 3D data derived from a terrestrial laser scanner and the...
2 Citations Source Cite
Published on Feb 28, 2017in Iforest - Biogeosciences and Forestry 1.25
Jonathan Sheppard4
Estimated H-index: 4
,
Christopher Morhart5
Estimated H-index: 5
+ 1 AuthorsHeinrich Spiecker21
Estimated H-index: 21
Abstract: Terrestrial laser scanning (TLS) technology is a powerful tool for assessing tree growth based on time series analysis, as it allows a level of scrutiny not achievable using established destructive techniques. We applied TLS technology to 21 wild cherry trees grown in a research plot near Breisach (southern Germany) in order to build quantitative structure models (QSMs) for each tree. Scans were carried out over three subsequent years (2012-2014), so that three QSMs per each tree were ...
2 Citations Source Cite
Published on Dec 1, 2016in Forest Ecosystems
Christopher Morhart5
Estimated H-index: 5
(University of Freiburg),
Jonathan Sheppard4
Estimated H-index: 4
(University of Freiburg)
+ 1 AuthorsHeinrich Spiecker21
Estimated H-index: 21
(University of Freiburg)
Background The global search for new ways to sequester carbon has already reached agricultural lands. Such land constitutes a major potential carbon sink. The production of high value timber within agroforestry systems can facilitate an in-situ carbon storage function. This is followed by a potential long term ex- situ carbon sinkwithin long lasting products such as veneer and furniture. For this purpose wild cherry (Prunus avium L.) is an interesting option for middle Europe, yielding high pric...
4 Citations Source Cite
Published on Nov 28, 2016in Annals of Silvicultural Research
Jonathan Sheppard4
Estimated H-index: 4
(University of Freiburg),
Matthias Urmes1
Estimated H-index: 1
(University of Freiburg)
+ 1 AuthorsHeinrich Spiecker21
Estimated H-index: 21
(University of Freiburg)
Pruning wild cherry ( Prunus avium L.) is a common silvicultural practice carried out to produce valuable timber at a veneer wood quality. Sub-optimal pruning treatments can permit un-occluded pruning wounds to develop devaluing decay. The aim of this study is to determine relevant branch, tree and pruning characteristics affecting the occlusion process of pruning wounds. Important factors influencing occlusion time for an optimised pruning treatment for valuable timber production utilising wild...
1 Citations Source Cite
Published on Jul 1, 2014in Annals of Forest Science 2.36
Christopher Morhart5
Estimated H-index: 5
(University of Freiburg),
Gerry C. Douglas9
Estimated H-index: 9
(Teagasc)
+ 6 AuthorsHeinrich Spiecker21
Estimated H-index: 21
(University of Freiburg)
& Context Current production from natural forests will not satisfy future world demand for timber and fuel wood, and new land management options are required. & Aims We explore an innovative production system that combines the production of short rotation coppice in wide alleys with the production of high-value trees on narrow strips of land; it is an alternative form of alley cropping which we propose to call ‘alley coppice’. The aim is to describe this alley coppice system and to illustrate it...
5 Citations Source Cite
Published on May 22, 2014in Forests 1.96
Jan Hackenberg5
Estimated H-index: 5
,
Christopher Morhart5
Estimated H-index: 5
+ 2 AuthorsMathias Disney28
Estimated H-index: 28
This paper presents a method for fitting cylinders into a point cloud, derived from a terrestrial laser-scanned tree. Utilizing high scan quality data as the input, the resulting models describe the branching structure of the tree, capable of detecting branches with a diameter smaller than a centimeter. The cylinders are stored as a hierarchical tree-like data structure encapsulating parent-child neighbor relations and incorporating the tree’s direction of growth. This structure enables the effi...
57 Citations Source Cite
Published on Oct 24, 2013in Forests 1.96
Christopher Morhart5
Estimated H-index: 5
,
Jonathan Sheppard4
Estimated H-index: 4
+ 1 AuthorsHeinrich Spiecker21
Estimated H-index: 21
In this study the influence of three different tillage systems in combination with eight varying weed treatments applied within the establishment year and its effect on the final above ground leafless biomass production (after the third growing season) of short rotation coppice poplar is presented. The three tillage systems included variants with ploughing and harrowing, variants with cultivation and ley cropping and variants without tillage. Weed treatments included the application of different...
11 Citations Source Cite
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