1.2 Contact details of resource persons and institutions involved in the assessment and documentation of the Technology

Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)

CDE Centre for Development and Environment (CDE Centre for Development and Environment) - Switzerland

Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)

CSE (CSE) - Senegal

1.3 Conditions regarding the use of data documented through WOCAT

The compiler and key resource person(s) accept the conditions regarding the use of data documented through WOCAT:

Yes

2.1 Short description of the Technology

Definition of the Technology:

A small fruit orchard in between fixed wandering dunes mainly with Citrus lemon and Mangifera indica trees

2.2 Detailed description of the Technology

Description:

This fruit orchard, mainly containing Mango (Mangifera indica) and Citrus (Citrus lemon) trees, is located in the hamlet of Thioukoun which is part of the village of Lompoul-sur-mer. The surface accounts for about 0.46 ha. Long before the establishment of the orchard, land cover consisted of denuded or sparsely covered white wandering sand dunes threatening agricultural production and villages alike. For some years vegetable production took place on this piece of land and later the orchard was established. Fruits are aimed at sale on the local market but production is insufficient for commercial purposes due to a pest and senescence of fruit trees. Citrus fruits are used by the cultivator and his family for pharmaceutical purposes. Inorganic fertilizers and organic manure are both used in order to improve soil fertility. Irrigation with water from one of the 8-9 m deep wells is practiced for a few Cocos nucifera plants but not for the other species. Labor is done by employees with whom the assigned caretaker of the orchard shares the little revenues from selling fruits on the market. The orchard is protected by a hedge made of dead Balanites aegyptiaca and Acacia raddiana branches and contains a small number of living individuals of other species.

Natural / human environment: The Niayes, located between Dakar and St. Louis, constitute a territory of 5-30 km width covering a surface of 4’200 km2. The region profits from a cool, humid climate, caused by the northern maritime winds (alizés) during the the dry season, while the rest of Senegal experiences the dry and hot Harmattan winds from the East. This results in favorable conditions for vegetable production during the dry season. Sand dunes cover the entire territory being categorized as white or wandering dunes, yellow semi-fixed dunes and as a system of continental fixed red dunes. The continental sand dunes support a shrub savanna which has been used as grazing ground by Fulbe pastoralists for centuries. The near-surface groundwater is the key that allows for cultivation of the zone, however considering the decline in rainfall during the last 60 years, the future of this water source remains uncertain. Lack of rainfall was one of the causes that led to the retreat of natural vegetation which therefore was not sufficient to stabilize the dunes any longer. Migration of sand dunes could now attain up to 10-12 m a year. However, deforestation at the beginning of the 19th century as well as overgrazing were important factors causing gradual desertification in this system.

2.3 Photos of the Technology

2.5 Country/ region/ locations where the Technology has been applied and which are covered by this assessment

2.6 Date of implementation

If precise year is not known, indicate approximate date:

• less than 10 years ago (recently)

2.7 Introduction of the Technology

Specify how the Technology was introduced:

• through land users' innovation

3.1 Main purpose(s) of the Technology

• improve production
• create beneficial economic impact
• create beneficial social impact

3.2 Current land use type(s) where the Technology is applied

Comments:

Major casch crop: Mango, lemon
Major food crop: Mango, lemon
Other crops: Cocos

Major land use problems (compiler’s opinion): wind erosion

3.3 Has land use changed due to the implementation of the Technology?

Has land use changed due to the implementation of the Technology?

• Yes (Please fill out the questions below with regard to the land use before implementation of the Technology)

3.4 Water supply

Water supply for the land on which the Technology is applied:

• mixed rainfed-irrigated

3.5 SLM group to which the Technology belongs

• improved ground/ vegetation cover

3.6 SLM measures comprising the Technology

Comments:

Main measures: agronomic measures

Type of agronomic measures: retaining more vegetation cover, manure / compost / residues, mineral (inorganic) fertilizers

3.7 Main types of land degradation addressed by the Technology

Comments:

Main type of degradation addressed: Et: loss of topsoil, Bc: reduction of vegetation cover

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires), other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (topography, dunes)

3.8 Prevention, reduction, or restoration of land degradation

Specify the goal of the Technology with regard to land degradation:

• prevent land degradation
• restore/ rehabilitate severely degraded land

4.1 Technical drawing of the Technology

5.1 Climate

5.2 Topography

Comments and further specifications on topography:

Landforms: Footslopes (sanddunes)

5.3 Soils

If available, attach full soil description or specify the available information, e.g. soil type, soil PH/ acidity, Cation Exchange Capacity, nitrogen, salinity etc.

Soil fertility: Low
Soil drainage/infiltration: Good
Soil water storage capacity: Very low

5.4 Water availability and quality

5.5 Biodiversity

Comments and further specifications on biodiversity:

Relic species from guinean ecozone present

5.6 Characteristics of land users applying the Technology

Indicate other relevant characteristics of the land users:

Land users applying the Technology are mainly common / average land users
Population density: 50-100 persons/km2
Annual population growth: 2% - 3%
Market orientation: Mixed (commercialisation difficult because of loss of production due to pest)

5.7 Average area of land used by land users applying the Technology

5.8 Land ownership, land use rights, and water use rights

Land ownership:

• state
• individual, not titled

Land use rights:

• communal (organized)

Water use rights:

• communal (organized)

5.9 Access to services and infrastructure

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Production

Water availability and quality

Income and costs

Socio-cultural impacts

Ecological impacts

Soil

Biodiversity: vegetation, animals

6.2 Off-site impacts the Technology has shown

6.4 Cost-benefit analysis

How do the benefits compare with the establishment costs (from land users’ perspective)?

How do the benefits compare with the maintenance/ recurrent costs (from land users' perspective)?

6.5 Adoption of the Technology

Comments:

There is a little trend towards spontaneous adoption of the Technology

6.7 Strengths/ advantages/ opportunities of the Technology

Strengths/ advantages/ opportunities in the land user’s view
Increased fruit availability
Maintenance of property rights of this piece of land (would be lost if uncultivated)

Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view
Increased vegetation cover How can they be sustained / enhanced? renew senescing stand of mango and lemon trees
Soil stabilization How can they be sustained / enhanced? maintain vegetation cover
Increased product diversification How can they be sustained / enhanced? plant more different fruit trees, e.g. Ziziphus mauritiana, Neocarya macrophylla

6.8 Weaknesses/ disadvantages/ risks of the Technology and ways of overcoming them

Weaknesses/ disadvantages/ risks in the land user’s view	How can they be overcome?
Pest	Subsidies for fertilizers
Lacking soil fertility and humidity

Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view	How can they be overcome?
Problems with infestation of mangos - "mouche blanche"	Pest management
Senescense of fruit tree stands	Renewal of fruit tree stands
Lacking soil fertility and humidity	Use improved compost and manure, leave land for fallow, increase vegetation cover

7.1 Methods/ sources of information