animal traction

Multipurpose donkey and hybrid cart prototype

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The use of equid-drawn vehicles is a common practice in many parts of the world, with vehicles usually being manufactured by local craftsmen, or by the users themselves. There is a huge variety of models, with 2-wheel carts being the most widely used as they are cheaper and easier to manufacture. 

Results obtained by TDS in recent studies which focused on both harnesses and welfare assessment of working equids, showed that poorly designed and ill-fitted harness leads to inefficient transfer of power and serious health and welfare issues. Carts may also play an important role here, as their incorrect use, often combined with poorly designed models, can be a cause or at least a predisposing factor. 

This research project intends to develop an easy to build multipurpose prototype 2-wheel cart for donkeys and hybrids, replicable anywhere in the world, using local resources. The project also includes the creation of a set of guidelines focused on good features of a cart and its correct use, including hitching techniques, pulling capacity of working equids, and good practices for the use of the cart. 

The research team involved in this project will gather a team of internal and external experts to achieve the aims described above. Following the strategy developed in the harness project, on-line resources focused on the DIY process of the prototype will be developed and will include all relevant theory and training material. 

From a strategic point of view, this project aligns closely with The Donkey Sanctuary Strategy, as it informs welfare, community, voice, and knowledge. The project will provide welfare improvements for donkeys and hybrids in a sustainable way, providing owners and users with support in providing good welfare for their donkeys and hybrids, by supporting them in cart building. The project will increase awareness of the needs of donkeys and hybrids when using carts and will involve knowledge sharing with communities and experts, using research to create learning resources and achieve positive practical outcomes for these animals.

Methodology

Phase 0: Invite a group of experts. 

List of experts: 

  • The Donkey Sanctuary team: - Welfare Assessment team: João Brandão Rodrigues; - Education team: Michelle Whitham-Jones, Tracey Warren; - Research team: Laura Kubasiewicz; - Equine Operations (Sanctuary): Andrew Judge, Maxine Carter; - El Refugio del Burrito: Francisco Zambrano; - Regional teams (IPP): Luis Aguilar (México), Asmamaw Kassaye (Ethiopia), Obadiah Sing'Oei (Kenya). 
  • FECTU: Cesc Aldabó. 
  • School of Technology and Management, Polytechnic Institute of Bragança: Luis Queijo. 
  • University of Melbourne: Mathilde Merridale. 

Phase 1: Online research on existing animal-drawn vehicles used worldwide. Selection of best models / desirable features of different models. 

Phase 2: Online discussion among experts, focused on aims 1 to 4. Creation of technical drawings of the prototype. Development of guidelines. 

Phase 3: Complete aims 5. Filming of the do-it-yourself process taking place at the School of Technology and Management (Bragança, Portugal) facilities, in straight collaboration with their technical staff. Build the DIY donkey cart online course. 

Phase 4: Complete aim 6. Lab tests to simulate different scenarios related with position of the cargo and the operator, to take place at the School of Technology and Management facilities, using our multipurpose donkey cart prototype. Specific tests will be decided by experts, depending on the final aspect of the prototype. 

Phase 5*: Field trial of the multipurpose animal-drawn prototype (place(s) to be decided). Phase 5 is the only phase directly involving donkeys. Prior to this phase, an Ethical and health and safety considerations form will be submitted for approval, ensuring that there are clear ethical standards in place for any donkeys involved in the trials. 

Phase 6: Complete aim 7 and 8: Selection and training of local manufacturers / Train the trainers’ process

Aims

The development of a multipurpose prototype 2-wheel cart for donkeys and hybrids, and the creation of guidelines that improve the knowledge and skills of equid owners in relation of how to properly use the cart and interact with the equids, will undoubtedly improve the welfare of the donkeys and hybrids. The development of on-line contents and their inclusion in a Train the Trainers approach will exponentially increase the knowledge transmission process, with a positive effect on equid welfare.

Objectives
  1. Understand the features of a good/ high welfare cart that is suitable for donkeys and hybrids, that is able to be used for different purposes and manufactured locally. 
  2. Develop a donkey cart prototype, based on simple technological solutions that will have a positive impact on health and welfare of working donkeys and hybrids. 
  3. Develop guidelines about good features of good 2-wheel cart (including safety). 
  4. Develop guidelines focused on the correct use of a 2-wheel cart:o Hitching techniques and harness (1 equid, 2 equids, 3 equids).
    o Pulling capacity of working equids (how much a donkey should pull). 
  5. Develop on-line resources focused on the DIY process of the donkey cart prototype. 
  6. Understand the influence of the position of the cargo and operator in the correct balance of the 2-wheel cart. 
  7. Develop a training programme for carts users: o Equid behaviour; 
    o Human-equid interaction; 
    o Safety. 
  8. Develop the Train the Trainers process for external partners / deliver training to local communities of equids' cart users, that will include all information generated on points 2 to 7.

Donkeys in transition: changing use in a changing world

Donkeys have a long history in the development of human societies. Typically referred to as a beast of burden, traditional uses for donkeys have included the transportation of goods and people, use in agricultural and forestry activities, to access water, and provide citizens in low- and middle-income countries a means of making an income for communities.

However, the rise of mechanization, the development of modern farming techniques, and the increasing availability of motorized vehicles have led to donkeys and mules becoming redundant from traditional roles in many parts of the world.

We provide examples of where donkeys have successfully transitioned from traditional roles to new, non-traditional roles in Europe and North America, and demonstrate that, although the roles and use of donkeys and mules are changing in a rapidly developing world, we can learn lessons from the past and apply them to current challenges.

As the need for working equids declines in transport and agriculture, they still hold great value for recreational, therapeutic, and environmentally friendly methods of animal traction. 

Volume
58
Publication date
Research output

Comparing effects of tillage treatments performed with animal traction on soil physical properties and soil electrical resistivity: preliminary experimental results

Soil Compaction results from compressive forces applied to compressible soil by machinery wheels, combined with tillage operations. Draft animal‐pulled equipment may also cause soil compaction, but a huge gap exists on experimental data to adequately assess their impacts and, actually, animal traction is an option seen with increasing potential to contribute to sustainable agriculture, especially in mountain areas. This study was conducted to assess the impacts on soil compaction of tillage operations with motor tractor and draft animals. In a farm plot (Vale de Frades, NE Portugal) treatments were applied in sub‐plots (30 m x 3 m), consisting in a two way tillage with tractor (T), a pair of cows (C) and a pair of donkeys (D). Undisturbed soil samples (120) were taken before and after operations for bulk density (BD) and saturated hydraulic conductivity (Ks). The relative changes in BD observed after tillage in the 0-0.05 m soil depth increased after operations in all treatments. The increase was higher in the tractor sub-plot (15%) than in those where animal traction was used (8%). Before operation Ks class was rapid and fast in all samples, and after operation this value was reduced to 33% in T, whereas it reached 83% in C. Electrical Resistivity Tomography (ERT) was useful as a tool to identify the alterations caused by tillage operations on soil physical status. These preliminary results confirm the potential of animal traction as an option for mountain agri‐environments, yet it requires much wider research to soundly ground its assets.

Volume
2
Start page
317
End page
328
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