1.2 Detalhes do contato das pessoas capacitadas e instituições envolvidas na avaliação e documentação da tecnologia

Nome da(s) instituição(ões) que facilitou(ram) a documentação/ avaliação da Tecnologia (se relevante)

Haramaya University (HU) - Etiópia

1.3 Condições em relação ao uso da informação documentada através de WOCAT

O compilador e a(s) pessoa(s) capacitada(s) aceitam as condições relativas ao uso de dados documentados através do WOCAT:

Sim

2.1 Descrição curta da tecnologia

Definição da tecnologia:

Gully rehabilitation and hill stabilization with Jatropha hedges.

2.2 Descrição detalhada da tecnologia

Descrição:

In the area around Bati in Ethiopia, Jatropha is used to stabilize hills ore to rehabilitate gullies. The technology was introduced during the last decade by local farmers on their plots. The advantage of Jatropha against other shrubs is that it is poisonous and therefore not browsed by animals. Additionally the seeds can be collected by household members and sold on the local market. The seed's oil can be used as a lamp oil or even for the production of bio-fuel.

Purpose of the Technology: Besides hedges and living fences, Jatropha is used for combating sheet or gully erosion. To stop erosion processes the Jatropha cuttings are planted across a gully or along hill sides to stabilize them in the same manner as check dams or terraces do. The plant is chosen because of its very tolerant character, rather high accessibility in the area and because it is easy to propagate by cuttings. Often Jatropha is used in combination with traditional stone check dams or terraces aiming for an increased stability of the technology itself. For that purpose Jatropha is planted in front of the stone walls or also on top of them.

Establishment / maintenance activities and inputs: In earlier times Jatropha was planted by seeds but nowadays, since there are a lot of plants in the area, propagation by cuttings is the more prominent form. Since the plants are pruned every year anyway, the cuttings are accessible almost in any case for free. At markets further away, the cuttings cost around one cent per piece. In order to rehabilitate a gully Jatropha cuttings are planted as near as possible in the selected area in a row across the gully. After rooting, the spaces between the plants are filled up with litter, shrubs or stones. In order to have a thick stem and avoid competition with crops, the plants are pruned every year. The thick main stems reach a height of approximately one meter which delineates the maximum height of possible soil collection. If the area behind the filled up gaps and the cuttings has silted up, the height is increased by adding new litter in the higher up gaps. In off farming season, the Jatropha seeds are collected and sold on the market to create additional income.

Natural / human environment: The case study site, Bati, lays in an semiarid climatic zone on 1600 m a.s.l. Rainfalls are erratic and the rain sum per year is between 500-1000 mm. The landscape is very hilly with rather steep slopes. The area has a high population density and growth. The agricultural sector is very dominant and lead by a lot of small scale farming with a lot of livestock and small plots of cropland.

2.3 Fotos da tecnologia

2.5 País/região/locais onde a tecnologia foi aplicada e que estão cobertos nesta avaliação

2.6 Data da implementação

Caso o ano exato seja desconhecido, indique a data aproximada:

• 10-50 anos atrás

2.7 Introdução da tecnologia

Especifique como a tecnologia foi introduzida:

• atráves de inovação dos usuários da terra

Comentários (tipos de projeto, etc.):

Farmers are using Jatropha curcas since approximately 30 years in the research area in Bati mostly for fencing. Innovative farmers started using the plant for stabilizing existing physical structures (stone walls, terraces, gully check dams) or using it as a complete substitute for these physical structures.

3.1 Principal/principais finalidade(s) da tecnologia

• Reduz, previne, recupera a degradação do solo
• Criar impacto econômico benéfico

3.2 Tipo(s) atualizado(s) de uso da terra onde a tecnologia foi aplicada

Uso do solo misturado dentro da mesma unidade de terra:

Sim

Especificar o uso misto da terra (culturas/ pastoreio/ árvores):

• Silvipecuária

Comentários:

Livestock density (if relevant):

> 100 LU /km2

Major land use problems (compiler’s opinion): Deforestation, overgrazing, cultivation of erosion-sensitive areas or steep slopes.

Major land use problems (land users’ perception): Too much soil loss and land degradation, no vegetation cover and poor soil moisture.

Grazingland comments: Livestock is not fenced in. Children herd the animals and watch out that they do not browse through crop fields. In off-farming season crop residues are collected from the field and stored next to the field. Animals are allowed to eat the still remaining residues on the field. After that, the animals are fed by the collected crop residues.

Livestock is grazing on crop residues

3.4 Abastecimento de água

Abastecimento de água para a terra na qual a tecnologia é aplicada:

• Precipitação natural

Comentários:

Water supply: Also mixed rainfed - irrigated

3.5 Grupo de GST ao qual pertence a tecnologia

• Medidas de curva de nível

3.6 Medidas de GST contendo a tecnologia

Comentários:

Main measures: vegetative measures, structural measures

Type of vegetative measures: aligned: -contour

3.7 Principais tipos de degradação da terra abordados pela tecnologia

Comentários:

Main type of degradation addressed: Wg: gully erosion / gullying

Secondary types of degradation addressed: Wt: loss of topsoil / surface erosion

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (Deforestation for the past 30 years.), over-exploitation of vegetation for domestic use (Wood collection for cooking and construction.), overgrazing (60% of the watershed area are cultivated - big grazing pressure on remaining land), other human induced causes (specify) (Cultivation of very steep slopes.), change of seasonal rainfall (Erratic rainfall.), Heavy / extreme rainfall (intensity/amounts) (If there is rain, it is intensive.), population pressure (High population pressure.), poverty / wealth (Poor facilities.)

Secondary causes of degradation: soil management (Poor soil management practices and lack of awareness.), crop management (annual, perennial, tree/shrub) (Annual cropping.), droughts (The research area is considered rather dry.), land tenure (If the land is rented, it is poorly managed.), inputs and infrastructure: (roads, markets, distribution of water points, other, …) (Poor access to fertilizer. Bad infrastructures.), education, access to knowledge and support services (Lack of awareness for soil degradation.), Low productivity of the land (As a consequence seeking for new/larger areas to increase production.)

3.8 Redução, prevenção ou recuperação da degradação do solo

Especifique o objetivo da tecnologia em relação a degradação da terra:

• Reduzir a degradação do solo
• Recuperar/reabilitar solo severamente degradado

Comentários:

Main goals: rehabilitation / reclamation of denuded land

Secondary goals: mitigation / reduction of land degradation

4.1 Desenho técnico da tecnologia

4.2 Informação geral em relação ao cálculo de entradas e custos

Outro/moeda nacional (especifique):

Ethiopian Birr

Se for relevante, indique a taxa de câmbio do USD para moeda local (por exemplo, 1 USD = 79,9 Real): 1 USD =:

16,82

4.3 Atividades de implantação

	Atividade	Periodicidade (estação do ano)
1.	One time initial sawing of Jatropha seeds (30 years ago).	Initial. Wet season.
2.	Cutting of the Jatropha cuttings (12.5 person days needed).	dry season
3.	Planting of the Jatropha cuttings (12.5 person days needed).	dry season

4.4 Custos e entradas necessárias para a implantação

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	Seeding	person day	1,0	1,0	1,0	100,0
Mão-de-obra	Cutting of the Jatropha cuttings	person day	12,5	1,0	12,5	100,0
Mão-de-obra	Planting of the Jatropha cuttings	person day	12,5	1,0	12,5	100,0
Equipamento	Tools for cutting	500m	1,0	5,0	5,0	100,0
Material vegetal	Seeds	kg	1,0	2,0	2,0	100,0
Custos totais para a implantação da tecnologia					33,0
Custos totais para o estabelecimento da Tecnologia em USD					1,96

4.5 Atividades recorrentes/manutenção

	Atividade	Periodicidade/frequência
1.	Collection of Jatropha seeds (5 person days needed).	Off farming season(Okt.)
2.	Filling up the gaps with litter (5 person days needed).	If necessary
3.	Pruning of the Jatropha hedges (15 person days needed).	Yearly before wet season.

4.6 Custos e entradas necessárias pata a manutenção/atividades recorrentes (por ano)

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	Collection of Jatropha seeds	Person days	5,0	1,0	5,0	100,0
Mão-de-obra	Filling up the gaps with litter	Person days	5,0	1,0	5,0	100,0
Mão-de-obra	Pruning of the Jatropha	person days	15,0	1,0	15,0	100,0
Equipamento	Tools	Person days	15,0	0,333333333	5,0	100,0
Material de construção	Wood	500m	1,0			100,0
Material de construção	Stone	500m	1,0			100,0
Custos totais para a manutenção da tecnologia					30,0
Custos totais de manutenção da Tecnologia em USD					1,78

Comentários:

Machinery/ tools: saw, axe

Total costs of a hectare are calculated for a hedge of 100 m length every 20 m (500 m total hedge) in the year 2011. Tool prices were estimated and labor costs were calculated with a daily wage of 1$.

4.7 Fatores mais importantes que afetam os custos

Descreva os fatores mais determinantes que afetam os custos:

Rough topology in the area, questionable availability of construction materials if they are not found nearby.

5.1 Clima

5.2 Topografia

Comentários e outras especificações sobre a topografia:

Altitudinal zone: 1501-2000 m a.s.l. (The study site is located at 1600m a.s.l.)
Landforms: Hill slopes (ranked 1) and valley floors (ranked 2)
Slopes on average: Hilly (ranked 1), rolling (ranked 2) and steep (ranked 3)

5.3 Solos

Caso disponível anexe a descrição completa do solo ou especifique as informações disponíveis, p. ex. tipo de solo, PH/acidez do solo, nitrogênio, capacidade de troca catiônica, salinidade, etc.

Soil depth on average: Very shallow (ranked 1), shallow (ranked 2)
Soil texture: Coarse/light (ranked 1) and medium (ranked 2)
Soil fertility is low
Soil drainage/infiltration is good
Soil water storage capacity is medium

5.4 Disponibilidade e qualidade de água

Comentários e outras especificações sobre a qualidade e a quantidade da água:

Ground water table is unknown.
Availability of surface water: Only during rainy season
Water quality (untreated): Poor drinking water (treatment required, mostly groundwater)

5.5 Biodiversidade

Comentários e outras especificações sobre biodiversidade:

Relative to other parts of Ethiopia.

5.6 Características dos usuários da terra que utilizam a tecnologia

Indique outras características relevantes dos usuários da terra:

Land users applying the Technology are mainly common / average land users
Population density: 100-200 persons/km2
Annual population growth: 6%
1% of the land users are rich (Adopt the most of SWC technologies).
19% of the land users are average wealthy.
89% of the land users are poor.
Off-farm income specification: Off-farm income has low importance.
Level of mechanization: Animal traction (plowing by oxen, ranked 1) and manual work (ranked 2)
Market orientation: Mixed (subsistence and commercial) Goat/sheep are main meat source (in household or on market).

5.7 Área média de terrenos utilizados pelos usuários de terrenos que aplicam a Tecnologia

5.8 Propriedade de terra, direitos de uso da terra e de uso da água

Propriedade da terra:

• Indivíduo, intitulado

Direitos do uso da água:

• Acesso livre (não organizado)

5.9 Acesso a serviços e infraestrutura

6.1 Impactos no local mostrados pela tecnologia

Impactos socioeconômicos

Produção

Disponibilidade e qualidade de água

Renda e custos

Impactos socioculturais

Impactos ecológicos

Ciclo hídrico/escoamento

Solo

Biodiversidade: vegetação, animais

Clima e redução de riscos de desastre

Outros impactos ecológicos

6.2 Impactos externos mostrados pela tecnologia

6.3 Exposição e sensibilidade da tecnologia às mudanças climáticas graduais e extremos/desastres relacionados ao clima (conforme o ponto de vista dos usuários da terra)

Mudança climática gradual

Mudança climática gradual

	Estação do ano	aumento ou diminuição	Como a tecnologia lida com isso?
Temperatura anual		aumento	bem

Extremos (desastres) relacionados ao clima

Desastres meteorológicos

	Como a tecnologia lida com isso?
Temporal local	bem
Tempestade de vento local	bem

Desastres climatológicos

	Como a tecnologia lida com isso?
Seca	bem

Desastres hidrológicos

	Como a tecnologia lida com isso?
Inundação geral (rio)	não conhecido

Outras consequências relacionadas ao clima

Outras consequências relacionadas ao clima

	Como a tecnologia lida com isso?
Período de crescimento reduzido	bem

6.4 Análise do custo-benefício

Como os benefícios se comparam aos custos de implantação (do ponto de vista dos usuários da terra)?

Como os benefícios se comparam aos custos recorrentes/de manutenção(do ponto de vista dos usuários da terra)?

Comentários:

Establishment needs a little time, although not very much. Maintenance work is very little needed and can be done if needed or in off-farming season. Establishment and mainentance costs are none or very little.

6.5 Adoção da tecnologia

De todos aqueles que adotaram a Tecnologia, quantos o fizeram espontaneamente, ou seja, sem receber nenhum incentivo/ pagamento material?

• 91-100%

Comentários:

Comments on acceptance with external material support: Local technology spread from farmer to farmer.
Comments on spontaneous adoption: Completely based on farmer's initiative.
There is a strong trend towards spontaneous adoption of the Technology
Comments on adoption trend: A lot of farmer are adopting (or already have adopted) Jatropha curcas as a SWC technology in the region.

6.7 Pontos fortes/vantagens/oportunidades da tecnologia

Pontos fortes/vantagens/oportunidades na visão do usuário da terra
Soil and water conservation are very important. Also the conservation of soil moisture. How can they be sustained / enhanced? Create farmer's awareness that SWC is very important for a sustainable land management.
In combination, Jatropha curcas can also be used to stabilize traditional stone structuress (terraces, dams). These physical structures are not consideret very stable and need a lot of work to establish and maintain. How can they be sustained / enhanced? Further research to improve physical structures, Jatropha curcas structures as well as their combination.
The roots bind the soil and holding it together and help collecting additional soil that otherwise would be washed out. The root and the plant also help to slow down flowing water. How can they be sustained / enhanced? Research on how tolerant is the plant on flooding etc.
Jatropha curcas is also a very good life fence that animals do not browse through because the leaves are poisonous. How can they be sustained / enhanced? Create awareness in the society that the plant is poisonous and should not be eaten.
The seeds can be sold. How can they be sustained / enhanced? Creating and improving markets, infrastructures and technologies that need Jatropca curcas oil or biofuel.

Pontos fortes/vantagens/oportunidades na visão do compilador ou de outra pessoa capacitada
Very low labor and money input for establishment and maintenance. How can they be sustained / enhanced? Keep the technology as simple as it is today.
Easy to atopt in a wide range of environments (Jatroha curcas is a rather tolerant plant). How can they be sustained / enhanced? Additional research to improve knowledge of Jatropha curcas.
Selling of the seeds is an additional income. If the seeds are crushed to oil it can substitute for example lamp oil that has to be bought. How can they be sustained / enhanced? Improve market situation and find technologies suitable to use Jatropha curcas oil or biofuel.
The plant can be used in a wide range of rehabilitation purposes (gully rehabilitation, hill stabilization, improvment of micro climate etc.) How can they be sustained / enhanced? Create and maintain awareness of the farmers.
If plantet on bare land only, the plant does not compete with food production. How can they be sustained / enhanced? Sensitize the farmers that food is more important than gaining an extra income so they do not give up their fields for Jatropha seed production.

6.8 Pontos fracos, desvantagens/riscos da tecnologia e formas de superá-los

Pontos fracos/desvantagens/riscos na visão do usuário da terra	Como eles podem ser superados?
If children eat the seeds they get sick.	Rise awareness that the plant is poisonous.
Plant competes for soil moisture.	Find a good compromise betweeen pruning and maximum toleratet shade as well as maximum soil moisture that can be taken by the plant to maximize yield.
Plant competes for sun light.	Find a good compromise betweeen pruning and maximum toleratet shade as well as maximum soil moisture that can be taken by the plant to maximize yield.

Pontos fracos/vantagens/riscos na visão do compilador ou de outra pessoa capacitada	Como eles podem ser superados?
Jatropha curcas is an alien plant although it is used for more than 30 years in the region.	Research on the long term effects of Jatropha curcas in specific areas.
If the plant should reach maximum yields inputs have to be increased as well and it has to be planted on fertile soil (food competition).	Make shure people only use it as fence or as a SWC plant on bare land.
To avoid shading the plant is often pruned every year and the yield is therefore very small (economically irrelevant).	Find a good compromise betweeen pruning and maximum toleratet shade to maximize yield.
The plant is poisonous. People have to take care and children have to be sensitized. But acording to the farmers eating the leaves or the seeds leads to stomach ache and is not too dangerous.	Create awareness in the society that the plant is poisonous and should not be eaten.
Farmers plant and use Jatropha curcas quite randomly and without any specific approach.	The role of science: find the best practice.

7.1 Métodos/fontes de informação

7.2 Referências às publicações disponíveis

Título, autor, ano, ISBN:

Bach S. (2012) Potentials and limitations of Jatropha curcas as a multipurpose crop for sustainable energy supply and soil and water conservation - a case study in Bati, Ethiopia, using the WOCAT approach. Unpublished master’s thesis, Centre for Development and Environment, University of Bern.