TY - JOUR A1 - Litschel, Johannes A1 - Berendt, Ferréol A1 - Cremer, Tobias T1 - Holzbauquote in Berlin-Brandenburg steigern JF - Holz-Zentralblatt N2 - Das im Februar gestartete Forschungsvorhaben "Adapt-Wald-Holz" unter der Leitung der Hochschule für nachhaltige Entwicklung Eberswalde (HNEE) steht im Zeichen von Branchenvernetzung, regionaler Wertschöpfung und Nachwuchsförderung. Ziel ist es, ein adaptives, d.h. anpassungsfähiges, Wald-Holz-Managementsystem für die Region Brandenburg-Berlin am Beispiel der Waldkiefer zu entwickeln. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7965 SN - 0018-3792 VL - 149 IS - 35 PB - DRW-Verlag Weinbrenner GmbH & Co. KG ER - TY - CHAP A1 - Cremer, Tobias A1 - Martetschläger, Lea A1 - Bartsch, Marco A1 - Riethmüller, Sina A1 - Schnautz, Carmel A1 - Gaiser, Thomas A1 - Bloch, Ralf T1 - Entwicklung ertragskundlicher und ökologischer Paramter in einem Brandenburger Alley Cropping System T2 - Tagungsband 9. Forum Agroforstsysteme, 27. & 28. September 2023 KW - Agroforst; Modellprojekt; Brandenburg; Reallabor Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7980 N1 - https://agroforst-info.de/nachlese-9-forum-agroforstsysteme/ ER - TY - JOUR A1 - Grimpe, J. A1 - Lucke, S. A1 - Lorenz, T. A1 - Bloch, Ralf A1 - Cremer, Tobias T1 - Agroforst auf trockenen Böden. On-Farm-Versuch in Brandenburg JF - LUMBRICO: konservierender ökologischer Landbau N2 - Die Anlage von Agroforstsystemen (AFS) wird seit einigen Jahren, auch in Deutschland, als Methode der Aufbauenden Landwirtschaft angesehen. Die Hochschule für nachhaltige Entwicklung Eberswalde (HNEE) erprobt diese Bewirtschaftungsform unter realen Bedingungen, im laufenden Geschäft eines Landwirtschaftsbetriebes – in einem sogenannten „Reallabor“. KW - Agroforst; On-Farm-Versuch; Brandenburg Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6441 SN - 1432-9387 IS - 11 SP - 41 EP - 45 PB - Emminger & Partner GmbH CY - Berlin ER - TY - JOUR A1 - de Miguel-Díez, Felipe A1 - Purfürst, Thomas A1 - Acuna, Mauricio A1 - Tolosana-Esteban, Eduardo A1 - Cremer, Tobias T1 - Estimation of conversion factors for wood stacks in landings and their influencing parameters: a comprehensive literature review for America and Europe JF - Silva Fennica N2 - In commercial transaction of stacked roundwood, the estimation of the stack net volume plays a key role. One generalized method to determine the net volume is using conversion factors that relate the gross and net volumes. In this literature review the developed methods to estimate the conversion factors as well as their influencing parameters were analyzed based on 153 references from America and Europe. According to the results, 48 different methods (including their variants) for estimating the conversion factors were developed. The newest methods enabled their accurate determination inexpensively, e.g., photo-optical methods or 3D simulation models. The analyzed references revealed that 30 parameters influence the conversion factors. Based on this comprehensive review, each stakeholder involved in the roundwood supply chain can know which method is used for estimating the conversion factors in the analyzed territories and which influencing parameters should be considered when purchasing roundwood in order to accurately assess the solid wood content in the stacks. KW - log properties; roundwood measurement; roundwood purchase; stack properties; wood supply chain Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6459 SN - 2242-4075 VL - 57 IS - 1 PB - The Finnish Society of Forest Science ER - TY - CHAP A1 - Litschel, Johannes A1 - Berendt, Ferréol A1 - Welp, Martin A1 - Cremer, Tobias T1 - Perspektiven von Schlüsselakteuren auf das Potenzial der Agroforstwirtschaft in Nordostdeutschland T2 - Tagungsband 9. Forum Agroforstsysteme, 27. & 28. September 2023 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-8040 SP - 16 EP - 17 ER - TY - JOUR A1 - Purfürst, Thomas A1 - de Miguel-Díez, Felipe A1 - Berendt, Ferréol A1 - Engler, Benjamin A1 - Cremer, Tobias T1 - Comparison of wood stack volume determination between manual, photo-optical, iPad-LiDAR and handheld-LiDAR based measurement methods JF - iForest - Biogeosciences and Forestry N2 - The measurement of roadside wood stacks in the forest still plays an important role in many forestry operations. Traditional manual measuring methods can be laborious, inaccurate and error-prone. Therefore, the issue is whether 2.5D or 3D optical remote sensing measuring methods provide more precise or detailed results and advantages in further data processing. This study examined and partly developed nine different manual, photo-optical, iPad®-LiDAR and handheld laser scanner-LiDAR-based wood stack measurement methods. Forty-seven wood stacks, ranging from 8.9 to 209.3 m3 (totalling approximately 2700 m3), were measured and compared using these nine methods. All the methods give volume estimations, and none can be seen to give the real or true wood stack gross volume. Surprisingly, the results varied significantly within and between the individual methods, with up to a 9% mean relative deviation. The relative deviation is strongly dependent on the size of the wood stack. The 3D measurement methods using iPad® RGB and LiDAR recorded lower timber volumes than the other methods, in contrast to the method based on samples taken with handheld laser scanner-LiDAR, which overestimated the volume. Generally, optical- and laser-based surveying techniques could be more widely applied in measuring wood stacks in the future. However, such automatic wood stack gross volume determination approaches still face some challenges, regarding accuracy in the case of the 2.5D methods and the lack of automatisation in the case of 3D methods. Consequently, further research is required in the near future. KW - iPad LiDAR; Wood Stack Volume; 3D Volume; Photo-optical Measurement; Personal Laser Scanner; SLAM; RVR Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-8062 SN - 1971-7458 VL - 16 IS - 4 SP - 243 EP - 252 PB - Italian Society of Silviculture and Forest Ecology ER - TY - CHAP A1 - Bloch, Ralf A1 - Cremer, Tobias A1 - Wartenberg, Ariani A1 - Molitor, Heike A1 - Lorenz, Tommy T1 - Innovative Lehr- und Lernform zur Implementierung eines Agroforstsystems – 4 Jahre Erfahrungen aus dem Reallabor „Ackerbaum“ T2 - Nachhaltig wirken: Reallabore in der Transformation N2 - Das Wahlpflichtmodul Agroforst wird an der Hochschule für nachhaltige Entwicklung Eberswalde als innovative Lehr- und Lernform, kurz ILL, von Studierenden für Studierende durchgeführt. Im Sinne einer offenen Lehrwerkstatt ist das Modul interdisziplinär ausgerichtet und für Bachelor- und Masterstudierende verschiedener Studiengänge anwählbar. Die studentischen Tutor:innen werden von zwei Professoren der Hochschule begleitet. Angeschlossen an das Modul ist neben Vorträgen und Exkursionen die Forschung im Reallabor „Ackerbaum“ wodurch transdisziplinäres Arbeiten vermittelt wird. Dabei handelt es sich um eine knapp 10 Hektar große Ackerfläche im Löwenberger Land, nördlich von Berlin. Auf dem die Studierenden sowohl Bäume pflanzen, als auch deren Wachstum und ihre Effekte auf das Mikroklima und die Ackerkulturen, sowie den Boden beobachten und dokumentieren. Wissenschaftliche Unterstützung erhält das Projekt durch Wissenschaftler:innen der Universität Bonn und dem ZALF e.V., die gemeinsam im „Agrarsysteme der Zukunft-Projekt – DAKIS“ (https://adz- dakis.com/ueber-dakis/) daran arbeiten, die Auswirkungen von Agroforstsystemen auf Ökosystemleistungen und Biodiversität zu erfassen und zu bewerten. In den vergangenen 4 Jahren 2017 – 2021 wurden von den Studierenden über 50 Projektberichte erstellt. Diese wurden aufwändig analysiert und mittels vorher definierter Indikatoren klassifiziert. Um weitere Rückschlüsse auf die Qualität der studentischen Lehre ziehen zu können, wurde in Umfragen die Meinung und Zufriedenheit der Studierenden als auch der Tutor:innen anonym abgefragt und ausgewertet. Die Daten werden aktuell ausgewertet und die Analyse kann auf der Tagung vorgestellt werden. Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6736 N1 - Tagung, 2.-3. Juni 2022 in Karlsruhe ER - TY - GEN A1 - Wenig, Charlett A1 - Reppe, Friedrich A1 - Horbelt, Nils A1 - Spener, Jaromir A1 - Berendt, Ferréol A1 - Cremer, Tobias A1 - Burgert, Ingo A1 - Eder, Michaela T1 - Adhesives free bark panels: an alternative application for a waste material Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6118 N1 - Research Data to the publication: https://doi.org/10.1371/journal.pone.0280721 ER - TY - JOUR A1 - Berendt, Ferréol A1 - Bajalan, Iman A1 - Wenig, Charlett A1 - Hinds, Charlotte A1 - Blaško, Ľubomír A1 - Cremer, Tobias T1 - Estimation of Scots pine bark biomass delivered to the wood industry in Northern Germany JF - Central European Forestry Journal N2 - Scots pine (Pinus sylvestris L.) is the most widely distributed pine species in the world. In Germany, as in many other European countries, it is a very important species both culturally and economically. Few studies have focused on bark volumes being delivered to the wood industry together with the roundwood, being potentially a valuable resource for material or energetic utilization. Therefore, logs from six different forest sites were collected and bark variables including double bark thickness (DBT) in three different categories, diameter, and bark damage (as a degree of miss-DBT) in three different categories, diameter, and bark damage (as a degree of miss-ing bark) were measured and analyzed in order to model bark volume (Vbark) and bark mass (Mbark). The correlation analysis using Pearson’s method showed that the highest correlation coefficients were observed from the correla-tion between DBT and Vbark, as well as between DBT and Mbark. Also, results demonstrated that with DBT greater than 20 mm, the percentage of Vbark exceeded 20%. Finally, different linear regression models were recommended to predict Vbark and Mbark based on the other variables. The results of this study can be used in different wood industries in order to predict bark volume and bark mass of e.g. truckloads or roundwood stacks. KW - bark thickness; bark volume; bark mass; Pinus sylvestris; correlation Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6126 SN - 2454-0358 VL - 69 IS - 2 SP - 89 EP - 97 PB - Sciendo ER - TY - JOUR A1 - Metzger, Lukas A1 - Cremer, Tobias A1 - Bloch, Ralf A1 - Lorenz, Tommy T1 - Innovative Lehre zur Förderung der Agroforstwirtschaf JF - B&B Agrar N2 - Die Hochschule für nachhaltige Entwicklung Eberswalde (HNEE) geht neue Wege: Im Zusammenspiel aus Lehre, Forschung und Praxis soll die Agroforstwirtschaft in Deutschland gefördert werden. Ein Reallabor ermöglicht Studierenden dabei, teamorientiert und partizipativ zu lernen. Y1 - 2022 SN - 1618-9833 VL - 75 IS - 2 SP - 18 EP - 19 PB - Bundesanstalt für Landwirtschaft und Ernährung (BLE) ER - TY - JOUR A1 - Amponsem, Bright A1 - Bensah, Edem Cudjoe A1 - Ahiekpor, Julius Cudjoe A1 - Cremer, Tobias A1 - Herold, Nadine A1 - Antwi, Edward A1 - Mensah, Isaac A1 - Narra, Satyanarayana A1 - Boahen, Benjamin T1 - Cleaner energy potential analysis for composite biomass residues from decentralized sawmills in Ghana- A case study for Oforikrom Municipality JF - Cleaner Engineering and Technology N2 - The variation of wood species processed in sawmills in developing countries generates composite waste which presents treatment challenges due to a lack of understanding of their physicochemical characteristics for proper planning for clean energy generation. Most of the waste is discarded or burnt openly which releases harmful gases into the environment. This study investigated the physicochemical characteristics of mixed sawdust generated from five wood species generated at a Ghanaian sawmill in Oforikrom Municipality for improving waste treatment. The particle size distribution (PSD), bulk density, proximate and ultimate values, thermogravimetric analysis (TGA) and structural analysis were used to characterize the composite sawdust for briquetting and gasification purposes. It was found that the net heating value (17.46 MJ/kg), some proximate and ultimate values meet briquette standard but high percentages of ash (2.95%), moisture (41.48%) and the possibility of nitrogen oxides emissions were notable challenges. PSD resulted in different high fine fractions which are unsuitable for densification. The increase of sieving amplitudes at 30, 50 and 80 rpm generated an average increase in sieve efficiency of fines by 4.22%. Mixing of fines (42.38–46.6%) and optimum particle size (53.40–57.62%) fractions was suggested as the best approach to enhance briquette density and durability. The FTIR spectra showed a range of peaks such as 1734.46 cm−1, 1620.48 cm−1, 1506.50 cm−1, 1462.02 cm−1, 1420.32 cm−1 etc. for functional groups identification. Composite sawdust spectra showed high absorbance with no shift of wavenumbers compared with temperate woods, however, it deviated massively when compared with industrial cellulose and organosolv lignin. TGA indicated that exact mixed wood pyrolysis temperatures, volatile and biochar fractions will always depend on sample compositions. The increase in heating rates yielded little significance to volatiles and char increments. Collection of clean sawdust and rooftop drying were recommended as a way of enhancing sawdust properties. Composite sawdust has a promising potential to support Ghana's activities for meeting the renewable energy generation targets. The understanding of these potential assessments is significant to boost the local municipality energy supply. KW - Composite sawdust; Heating value; Structural compositions; Particle size distribution; Thermogravimetric analysis; Bioenergy Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6154 SN - 2666-7908 IS - 11 PB - Elsevier ER - TY - JOUR A1 - Cremer, Tobias A1 - Major, Friederike A1 - Agyeman, Yaw Boakye A1 - Rottig, Franziska T1 - Biosphärenreservat optimieren JF - E+Z Entwicklung und Zusammenarbeit N2 - Deutsche und ghanaische Forscher*innen arbeiten zusammen, um die lokale Bevölkerung in die Entwicklung eines UNESCO-Biosphärenreservats einzubeziehen. Ziel ist es, Forschungslücken zu schließen, um den Gemeinden konkrete Entwicklungsmöglichkeiten aufzuzeigen. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6799 UR - https://www.dandc.eu/sites/default/files/digital-monthly/ez_2023-08.pdf SN - 2366-7249 IS - 8 SP - 29 EP - 30 PB - Fazit Communication GmbH ER - TY - JOUR A1 - Cremer, Tobias T1 - Zu Besuch bei den Nasenbeißern JF - Deutsches Bienen-Journal Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6012 SN - 0943-2914 VL - 28 IS - 3 SP - 66 EP - 68 PB - Deutscher Bauernverlag GmbH ER - TY - JOUR A1 - Wenig, Charlett A1 - Reppe, Friedrich A1 - Horbelt, Nils A1 - Spener, Jaromir A1 - Berendt, Ferréol A1 - Cremer, Tobias A1 - Frey, Marion A1 - Burgert, Ingo A1 - Eder, Michaela T1 - Adhesives free bark panels: An alternative application for a waste material JF - PloS one N2 - The proportion of bark in tree trunks is in the range of ~ 10–20%. This large amount of material is currently mainly considered as a by- or even waste-product by the timber processing industry. Recently, efforts towards the use of bark have been made, e.g. as a raw material to harvest different chemical compounds or as an additive for wood particle boards. Our motivation for this work was to keep the bark in an almost natural state and explore alternative processes and applications for use. The traditional method of de-barking tree trunks by peeling was used to harvest large bark pieces. Two pieces of peeled bark were placed crosswise, with the rhytidom side (outer bark) facing each other. After different conditioning steps, bark pieces were hot pressed to panels without adding adhesives. These experiments on bark samples of different Central European tree species suggest that production of panels with species dependent properties is possible and feasible. This is a step towards producing sustainable panels by using a natural waste material, while retaining its beneficial structure and its natural chemical composition. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6104 VL - 18 IS - 1 PB - Public Library of Science (PLoS) ER - TY - JOUR A1 - Litschel, Johannes A1 - Berendt, Ferréol A1 - Cremer, Tobias A1 - Welp, Martin T1 - Mit regenerativen Materialien zur Brandenburger Bauwende? JF - Holz-Zentralblatt N2 - Gemeinsam mit zahlreichen Akteuren aus Berlin und Brandenburg untersucht die Hochschule für nachhaltige Entwicklung Eberswalde (HNEE) in einem breit angelegten Modellvorhaben die Potenziale regenerativer Materialien für die Baubranche. Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6213 SN - 0018-3792 VL - 148 IS - 36 SP - 608 EP - 608 PB - DRW-Verlag Weinbrenner GmbH & Co. KG ER -