New harvesting system for nurseries – ROD-PICKER finished successfully

The following press release was published by ttz Bremerhaven in March 2015. The original release can be downloaded in an English language in a German language version:

Download English version

Download German version

An automated harvesting system for planting material for short rotation coppice (SRC) increases the cost efficiency of wood fuel production.

March 2015. Harvesting, sorting, bundling, packaging: Until now the production of planting material (cuttings) for the breeding of willow and poplar was an expensive and hard manual work. As a result the production of renewable energy from wood got under pressure in economical perspectives. The EU-funded research project ROD PICKER has now completed the remedy. The harvesting and processing of plant material from nurseries could be automated with the development of a new technology. By the use of the system the staff employment is reduced by more than two-thirds.

European countries have a great potential for SRC. However, the technical possibilities as well as costs for breeding were limiting the appropriate supply of enough planting material. The automation and optimization of the cutting of the rods in the field and their processing (sorting, bundling, packaging) was the aim of the ROD-PICKER project, as providing of these rods and cuttings is still a hindrance for the development of the sector: linked to intensive manual labor and inconsistent quality standards. In order to accommodate economic and technical receivables the ROD-PICKER consortium has developed an efficient and complete system, which includes several steps from the field to the delivery. Given the varying working speeds of different stages it was necessary to divide the system into two sections: the harvesting unit and the sorting and bundling unit.

The harvesting module

The system developed for harvesting and processing of planting material from nurseries for the plantations is divided into two subsystems, a harvester and a sorting and bundling unit. The first step of harvesting is realized by two saw blades at the ground level and optionally one top cutter (sickle bar) which represents a preliminary working step. As a second step downstream transmission belts transport the cut off rods to the included platform of the harvester. In comparison with “normal” SRC-harvester it has to be mentioned that the difficulty of harvesting planting material is the necessity of careful handling of rods. With a harvesting speed of up to 13 km/h (3,6 m/s) and a movable platform, which optimizes the arrangement of the harvest on the platform with ca. 3,8 m length and 2,6 m width the ROD-PICKER harvester can load up to 1.000 kg of harvested rods which equals – depending on the plant spacing – several hundred meters of willow or poplar rows. In principle also other species with a diameter up to 80 mm can be harvested, so the harvester is also suitable for other species used in short rotation plantations. After the payload limit is reached a side gate with integrated unloading belts can be used for depositing the rods, The harvester was designed and built as a two-wheel trailer with a swing gear which can swivel out for harvesting action, so that the harvesting unit is offset to the lane of the pulling tractor. To operate the system the maximum PTO (Power Take-Off) of the unit has to be 36 kW, a suitable towing vehicle should have a power of 60 kW in minimum which is very low in comparison with other harvester for “normal” SRC-harvesting. Users of the harvester can use a remote control in the driver’s cab to operate the machine and handle the rods.

The sorting and bundling unit

Due to the fact that the planting material has to fulfill different quality characteristics (e.g. requirements according to directive EU – 1999/105 for reproductive material) the harvested rods are processed after harvesting. Parameters like diameter (defined range 7 – 25 mm), length (defined range 1.200 – 2.300 mm), the straight shape as well as absence of branches can be measured by the unit, so it can be guaranteed that the resulting product fulfills these criteria. The maximum manageable possible diameter of rods is 30 mm, while the length of rods doesn’t represent a limitation to the process. In a first step, each rod goes through a cutting subunit with two knives and sensor/camera-technology, where the machine detects and sorts out damaged or multiple branched rods and cuts them off. Processed rods with diameters within the defined range and simultaneous suitable length are transported to a compressed air mechanism which ensures that sale-worthy rods are pushed to a second parallel arranged band conveyor. If a number of rods (defined by the farmer) is reached the second band-conveyor moves the loose rods forward to the bundling unit. Being fastened two or three times, the final product can be packaged. The working speed of the sorting and bundling unit is one box per day and sorting line which equals an accumulated rod-length of 6.000 m. An advantage of the unit is that it just requires one or two workers to operate. The sorting and bundling unit consists of bought standard parts and parts designed exclusively for this machine.


The involved companies EGEDAL MASKINFABRIK A/S (Danmark), SALIXENERGI EUROPE AB (Sweden) and LEMPE GBR (Germany) will market the development in the future. The research institutions of the project, the TECHNISCHE UNIVERSITÄT DRESDEN (Germany), UNIVERSITATEA POLITEHNICA DIN TIMISOARA (Romania) and the ttz Bremerhaven (Germany), evaluated the technical operation of the prototype. Furthermore economic and ecological analyses have shown advantages for the potential user. Besides the practical realization the regulatory framework as well as a sustainability assessment, consisting of a life cycle assessment, social and economic assessment, were examined.
For further information and a video of the harvester on-site the official project website can be checked. The ROD-PICKER project has received funding from the European Union’s Seventh Framework Programme managed by RES – Research Executive Agency ( (FP7/2007-2013)) under grant agreement n° [315416]. It started in October 2012 and had a project duration of two years.

Workshop/Training in Sweden

On September 19th, 2014 the ROD-PICKER consortium will carry out a second training and workshop activity in Svalöv (SWE) at SalixEnergi’s facility. It will include the presentation of results from the last two years as well as the presentation of new clones and harvesting technology. Interested people can contact the consortium for further information.

ROD-PICKER workshop and demonstration performed successfully

The recently announced workshop and demonstration of the ROD-PICKER system was carried out on March, 7th by the consortium. 50-60 people attend to see the system in practical application. A short report with pictures of the event can be found in the documents below (English and German language). The consortium thanks all attendees!

English version

German version

ROD-PICKER workshop/demonstration

In line with the project ROD-PICKER – supported by the 7th EU framework program – a new automated harvesting and treatment system for SRC-nurseries is developed which consists of a harvesting module and a treatment module. It includes the steps from harvesting to shipping of the rods . Both modules can be operated independent of each other and allow a high degree of flexibility for the end user, while reducing the cost.

After successful trials , the ROD-PICKER consortium wants to offer the opportunity to join a practical demonstration of the system. We invite you to participate on the 7th of March 2014 in a location near Dresden (Seifersdorf and Höfgen). Further details you can find within the attached document (german language). Feel free to contact us directly.


Harvesting system for SRC-nurseries in the practical test

Press release
December 2013

Short rotation plantations (SRP) play a prominent role in the exploitation of energy wood. To create SRP, it is required to meet several requirements for the planting material of nurseries. Within the EU-funded project „ROD-PICKER“ the partners are developing a harvesting system that takes into account these criteria. The field tests of the prototype in real SRPs are scheduled to start next winter.

CAD model of the ROD PICKER harvesting module with cutting unit, Top Cutter and conveyor unit [Copyright: TU Dresden AST].

Harvesting plants is troublesome, especially when it comes to the production of cuttings. The rods required for this purpose have to be cut off, sorted, bundled and then packaged. The EU-funded project „ROD PICKER“ is developing a harvesting system to automate this complex process. After the project partners identified all the necessary requirements and technical components, they have begun with its practical implementation. In January/February 2014 they’ll send the harvesting system to short rotation fields to perform tests under real conditions.

„It is the multi-functionality, which characterizes the ROD PICKER system. The system is harvesting, sorting, bundling and packaging the rods which will be used for the production of cuttings for SRC. Therefore, the ROD PICKER system is – in comparison to the conventional harvesting methods – much more powerful, „says project manager Bárbara De Mena Pardo of ttz Bremerhaven. The level of automation in conventional methods is usually limited to the cutting off of the rods from the rest of the plant. But with the ROD-PICKER-system the elaborate manual sorting and packing of rods is eliminated.

The ROD – PICKER – harvesting system consists of several subsystems that can be customized and which are combinable in a modular and coordinated way. The subsystems are developed with the close cooperation of all project partners and were developed and technically implemented with a large compatibility to existing harvesting-systems. The system cuts the rods and then sorts them with the help of purpose-oriented camera and sensor technology. The precise sorting process takes into account both the length of the rods, which can be set as desired, as well as possible ramifications, the shape and diameter of the rods. Finally, the rods will be bundled depending on the variety and packaged in boxes.

The 7th EU Framework Program funded project ROD – PICKER unites six partners from the fields of energy wood use. It started in October 2012 and will run for a period of two years.

note: This press release was published by ttz Bremerhaven originally

Progress in ROD-PICKER after nine months

The developments in ROD-PICKER stat to bear their fruits:
The objectives and work to be performed in the first nine months of the project comprised the determination of the system requirements and the first steps in the design of the prototype. On the dissemination and exploitation tasks, the main activity was to widespread the start of the project and to setup the project’s website.

The partners prepared and distributed a questionnaire among partners in Germany, Denmark, Romania and Sweden to determine the end users’ requirements and continued with the determination of the data needed as input and output for an optimal functioning of the ROD-PICKER system.


The design of the prototype started on three fronts: the design of the harvester, or cutting unit, of the sorting unit and of the monitoring and control module. Progress has been obtained in all three, and no major deviations from the work plan are foreseen for the coming months.


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