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

Nome do projeto que facilitou a documentação/avaliação da Tecnologia (se relevante)

Manual of Good Practices in Small Scale Irrigation in the Sahel (GIZ )

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

Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH (GIZ) - Alemanha

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

Misereor - Alemanha

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

Quando os dados foram compilados (no campo)?

01/07/2012

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

Sim

1.4 Declaração de sustentabilidade da tecnologia descrita

A tecnologia descrita aqui é problemática em relação a degradação da terra de forma que não pode ser declarada uma tecnologia de gestão sustentável de terra?

Não

2.1 Descrição curta da tecnologia

Definição da tecnologia:

Zai planting pits are designed to collect rainwater and to conserve nutrients in order to improve crop production and food security.

2.2 Descrição detalhada da tecnologia

Descrição:

Zai or tassa planting pits are an old farming technique rediscovered after the great drought of 1973/74 and later perfected by development partners working with the farmers. It involves digging planting pits with a diameter of at least 30 to 40 cm and 10 to 15 cm deep. They are spaced 70 to 80 cm apart, resulting in around 10,000 pits per hectare. Staggered rows of holes are dug perpendicularly to the slope. The earth dug out of the hole is piled up to form a small ridge around the rim, which captures water. A couple of handfuls of organic fertiliser or compost are put into each pit. They are normally made in the dry season before the first rains start. However, it is recommended that the pits be made immediately after the rainy season, when the soil is still moist and the weather is not too hot. If the pits are in place early in the dry season, they act as traps during the windy period in February and March, retaining rich dust carried by the harmattan and wind-blown organic matter. At least 3 tonnes of compost per hectare is recommended.

Purpose of the Technology: The arrangement of the pits in staggered rows ensures the most efficient collection of rainwater and slows the flow of water over the surface. The zai technique concentrates and conserves nutrients and water near the roots of the plants grown in them. The application of organic fertiliser directly around the plants is an economical use of a factor of production to which most farmers have limited access. It also reactivates biological activity, increases fertility and loosens the soil.
As zai planting pits restore degraded, uncultivated land, they lessen the pressure to clear other land for farming. They also reduce the vulnerability of plants during dry spells and droughts, ensuring crop production and improving food security.
Plots with zai planting pits (with fertiliser) average yields of 409 kg of millet grain per hectare, compared to 195 kg per hectare registered on control plots. Millet yields can therefore be doubled with this technique.

Establishment / maintenance activities and inputs: The zai technique requires high labour input. It is estimated that between 40 and 60 man-days per hectare are required, depending on the density of the pits. There is a mechanised system for making the holes, using a special animal-drawn plough, which considerably reduces the number of man-days required to 7 per hectare.
If the pits are prepared each year or once every two years (using the same pits or making new ones in the spaces between the old ones), soil fertility is restored and the crop cycle can be resumed. The application of organic fertiliser in sufficient quantities enables the plot to be cultivated sustainably. After five years, it can be farmed in the normal way.
Covering extensive areas with zai planting pits requires a high level of community mobilisation and effective organisation and logistics. Apart from this, the technique is very simple to implement and easily mastered by the farmers.

Natural / human environment: Zai planting pits are used on marginal or degraded land that is no longer cultivated, such as low-gradient pediments and land with encrusted soil in areas with rainfall levels of less than 800 mm a year. They are not recommended for sandy soils, as they are not stable when dug in this type of soil, or for valley bottoms, where they risk being flooded. Zai planting pits are particularly useful in areas where land use pressure is high, as they permit the rehabilitation of unproductive land for farming.
From the point of view of climate change adaptation, zai planting pits are particularly useful in areas with erratic or low rainfall, as they prevent the loss of water. As the fertiliser is placed inside the pits, it is not washed away by heavy rain.

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:

• através de projetos/intervenções externas

Comentários (tipos de projeto, etc.):

developed, implemented and disseminated as part of projects and programmes undertaken from the 1980s onwards to combat desertification and improve natural resource management. Implemented by GIZ (German Federal Enterprise for International Cooperation), PDRT (Projet de développement rural de Tahoua - Tahoua Rural Development Project), PASP (Projet de protection intégrée des ressources agro-sylvo-pastorales Tillabéri-Nord - Project for the Integrated Protection of Agricultural, Forest and Rangeland Resources in Tillabéri-Nord)

3.1 Principal/principais finalidade(s) da tecnologia

• Melhora a produção
• Criar impacto econômico benéfico

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

Comentários:

Major land use problems (compiler’s opinion): soil erosion, fertility decline, aridification, loss of limited rainwater by runoff
Type of cropping system and major crops comments: farmers are mainly agropastoralists with some communities specialised on pure pastoralism
Constraints of forested government-owned land or commons
Type of grazing land: Extensive grazing: Nomadism, semi-nomadism/pastoralism. Intensive grazing: Cut-and-carry/zero grazing and improved pasture

3.3 Mais informações sobre o uso da terra

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

• Precipitação natural

Comentários:

Número de estações de cultivo por ano:

• 1

Especifique:

Longest growing period in days: 120, Longest growing period from month to month: August to October

Densidade animal (se relevante):

1-10 LU /km2

3.4 Grupo de GST ao qual pertence a tecnologia

• Perturbação mínima ao solo
• Gestão integrada de fertilidade do solo

3.6 Medidas de GST contendo a tecnologia

3.7 Principais tipos de degradação da terra abordados pela tecnologia

Comentários:

Main causes of degradation: soil management (Unadapted landuse methods, reduced or abandoned fallow periods), crop management (annual, perennial, tree/shrub) (Neglect of fallow periods and crop rotation), droughts (due to heat waves), population pressure (rapidly growing population increasing pressure on land), land tenure (insecure access to land and collectively managed communal land), poverty / wealth (very poor population)

Secondary causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (deforestation through overgrazing and fire wood collection), over-exploitation of vegetation for domestic use (firewood collection), overgrazing (cattle, sheep and goats), change in temperature (Climate change: heat waves), change of seasonal rainfall (more variable onset of rain), Heavy / extreme rainfall (intensity/amounts) (more variable and intensive rains), wind storms / dust storms (frequent storms), floods (due to intensive rain storms), labour availability (some migration of men to nearby cities), education, access to knowledge and support services (high level of illiteracy)

3.8 Redução, prevenção ou recuperação da degradação do solo

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

• Recuperar/reabilitar solo severamente degradado

4.1 Desenho técnico da tecnologia

4.2 Especificações técnicas/ explicações do desenho técnico

It involves digging planting pits with a diameter of at least 30 to 40 cm and 10 to 15 cm deep. They are spaced 70 to 80 cm apart, resulting in around 10,000 pits per hectare. Staggered rows of holes are dug perpendicularly to the slope. The earth dug out of the hole is piled up to form a small ridge around the rim, which captures water. A couple of handfuls of organic fertiliser or compost are put into each pit.

Location: Niger

Technical knowledge required for field staff / advisors: moderate
Technical knowledge required for land users: low

Main technical functions: control of dispersed runoff: retain / trap, control of dispersed runoff: impede / retard, control of concentrated runoff: retain / trap, control of concentrated runoff: impede / retard, increase in organic matter, increase in nutrient availability (supply, recycling,…), increase of infiltration, increase / maintain water stored in soil, water harvesting / increase water supply, sediment retention / trapping, sediment harvesting
Secondary technical functions: improvement of ground cover, stabilisation of soil (eg by tree roots against land slides), reduction in wind speed

Retention/infiltration ditch/pit, sediment/sand trap
Spacing between structures (m): 0.7-0.8
Depth of ditches/pits/dams (m): 0.15
Length of ditches/pits/dams (m): 0.3-0.4

4.3 Informação geral em relação ao cálculo de entradas e custos

Outro/moeda nacional (especifique):

CFA Franc

4.4 Atividades de implantação

	Atividade	Tipo de medida	Periodicidade
1.	marking out the rows perpendicular to the slope	Estrutural
2.	digging pits in staggered rows	Estrutural
3.	forming a ridge on the downhill side	Estrutural
4.	A couple of handfuls of organic fertiliser or compost are put into each pit	Agronômico

4.5 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	labour		1,0	16,3	16,3
Mão-de-obra	transport and planting trees		1,0	12,3	12,3
Equipamento	machine use		1,0	23,6	23,6
Material vegetal	seedlings
Custos totais para a implantação da tecnologia					52,2

4.6 Atividades recorrentes/manutenção

	Atividade	Tipo de medida	Periodicidade/frequência
1.	the pits are prepared each year or once every two years (using the same pits or making new ones in the spaces between the old ones	Estrutural
2.	applying organic fertiliser every two years (1 to 2 hand-fuls per pit, amounting to around 3 tonnes per hectare).	Agronômico

4.8 Fatores mais importantes que afetam os custos

Descreva os fatores mais determinantes que afetam os custos:

Labour: 40 to 60 man-days per hectare
• marking out the rows perpendicular to the slope
• digging pits in staggered rows
• forming a ridge on the downhill side
• applying organic fertiliser every two years (1 to 2 handfuls per pit, amounting to around 3 tonnes per hectare).
Other costs: transportation of 30 cartloads of manure.

5.1 Clima

5.2 Topografia

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 texture: Fine to medium (sandy to clayey loams)
Soil fertility: Very low to medium
Soil drainage/infiltration: Poor and medium (ranked 2)
Soil water storage capacity: Low and medium (ranked 2)

5.4 Disponibilidade e qualidade de água

5.5 Biodiversidade

5.6 Características dos usuários da terra que utilizam a tecnologia

Indique outras características relevantes dos usuários da terra:

Population density: 10-50 persons/km2
Annual population growth: 3% - 4% (mostly poor households below poverty line).
Off-farm income specification: men migrate temporarily or permanently to cities for off-farm income, women and men seasonally carry out paid farm work
Market orientation of production system: subsistence (self-supply, Most households crop for subsistence, mainly for small agropastoralists ), mixed (subsistence/commercial, crop surplus is sold on market, medium agropastoralists) and commercial market (Some vegetable growing, pastoralists)
Level of mechanization: Menual work (ranked 1) and animal traction (ranked 2, ox, donkey)

5.7 Média da área de terra própria ou arrendada por usuários da terra que utilizam a tecnologia

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

Comentários:

traditional land use rights prevail. On fields individual land use rights, communal rights on pasture and forest land (collection of wood and other products (fruits, medicinal plants))

5.9 Acesso a serviços e infraestrutura

6.1 Impactos no local mostrados pela tecnologia

Impactos socioeconômicos

Produção

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	Tipo de mudança climática/extremo	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	não 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 bem

Outras consequências relacionadas ao clima

Outras consequências relacionadas ao clima

	Como a tecnologia lida com isso?
Período de crescimento reduzido	não conhecido

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)?

6.7 Pontos fortes/vantagens/oportunidades da tecnologia

Pontos fortes/vantagens/oportunidades na visão do/a compilador/a ou de outra pessoa capacitada
The arrangement of the pits in staggered rows ensures the most efficient collection of rainwater and slows the flow of water over the surface. The zai technique concentrates and conserves nutrients and water near the roots of the plants grown in them.
Zai planting pits are particularly useful in areas where land use pressure is high, as they permit the rehabilitation of unproductive land for farming. Therefore they lessen the pressure to clear other land for farming.
They also reduce the vulnerability of plants during dry spells and droughts, ensuring crop production and im- proving food security.
It permits a rational use of fertiliser. When fertiliser is spread on the surface of a plot without zai planting pits, it can be washed away by runoff.
very simple to implement and easily mastered by the farmers

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

Pontos fracos/vantagens/riscos na visão do/a compilador/a ou de outra pessoa capacitada	Como eles podem ser superados?
The zai technique requires high labour input.
Zai planting pits are not recommended for light soils, as they fill in too quickly

7.1 Métodos/fontes de informação

7.3 Links para informação relevante que está disponível online

Título/ descrição:

Good Practices in Soil and Water Conservation. A contribution to adaptation and farmers´ resilience towards climate change in the Sahel. Published by GIZ in 2012.

URL:

http://agriwaterpedia.info/wiki/Main_Page