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)

Inades Formation Tanzania (Inades Formation Tanzania)

1.3 Conditions regarding the use of data documented through WOCAT

When were the data compiled (in the field)?

24/02/2011

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

Ja

2.1 Short description of the Technology

Definition of the Technology:

Gully healing using bananas as barriers

2.2 Detailed description of the Technology

Description:

Gully pits (2'*2'*2') are dug across the gully. Smaller pits are dug in the bigger ones. Manure is filled in the smaller ones. Bananas are planted in the pits. Trash is filled in the bigger pits. A trash line is dug and supported by pegs. The speed of the runoff is lowered by the pits and trashline. The plants regenerate in the gully.

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:

• more than 50 years ago (traditional)

2.7 Introduction of the Technology

Specify how the Technology was introduced:

• as part of a traditional system (> 50 years)

Comments (type of project, etc.):

farmer innovation

3.1 Main purpose(s) of the Technology

• reduce, prevent, restore land degradation

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

Comments:

Major land use problems (compiler’s opinion): gully erosion due to the steep slopes

3.3 Further information about land use

Number of growing seasons per year:

• 1

Specify:

Longest growing period in days: 120; Second longest growing period in days: 60

3.4 SLM group to which the Technology belongs

• improved ground/ vegetation cover
• cross-slope measure

3.5 Spread of the Technology

Specify the spread of the Technology:

• evenly spread over an area

If the Technology is evenly spread over an area, indicate approximate area covered:

• < 0.1 km2 (10 ha)

3.6 SLM measures comprising the Technology

3.7 Main types of land degradation addressed by the Technology

Comments:

Secondary types of degradation addressed: Cn: fertility decline and reduced organic matter content, Ha: aridification

3.8 Prevention, reduction, or restoration of land degradation

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

• restore/ rehabilitate severely degraded land

Comments:

Secondary goals: prevention of land degradation, mitigation / reduction of land degradation

4.2 Technical specifications/ explanations of technical drawing

Technical knowledge required for field staff / advisors: moderate

Technical knowledge required for land users: high

Main technical functions: control of concentrated runoff: impede / retard

Secondary technical functions: control of concentrated runoff: retain / trap, sediment harvesting

Structural measure: diversion ditch/cut-off drain
Vertical interval between structures (m): 1
Spacing between structures (m): 6
Depth of ditches/pits/dams (m): 0.6
Width of ditches/pits/dams (m): 0.6
Length of ditches/pits/dams (m): 0.6
Width of bunds/banks/others (m): 0.6
Length of bunds/banks/others (m): 0.6

Structural measure: bunds/banks: contour
Vertical interval between structures (m): 1
Spacing between structures (m): 6

Structural measure: trash
Vertical interval between structures (m): 1
Spacing between structures (m): 6
Height of bunds/banks/others (m): 0.5
Width of bunds/banks/others (m): 1

Construction material (earth): top soil

Construction material (other): crop remain, farmyard manure

Lateral gradient along the structure: 5.00%

4.3 General information regarding the calculation of inputs and costs

other/ national currency (specify):

Tanzanian shillings

Indicate exchange rate from USD to local currency (if relevant): 1 USD =:

800.0

4.5 Costs and inputs needed for establishment

	Specify input	Unit	Quantity	Costs per Unit	Total costs per input	% of costs borne by land users
Labour	Labour	persons/day/ha	336.0	1.9	638.4	90.0
Equipment	Tools	ha	1.0	11.25	11.25	100.0
Fertilizers and biocides	Seedlings	ha	1.0	1250.0	1250.0	100.0
Construction material	Trash	ha	1.0	960.0	960.0	30.0
Total costs for establishment of the Technology					2859.65

Comments:

Duration of establishment phase: 36 month(s)

4.7 Costs and inputs needed for maintenance/ recurrent activities (per year)

	Specify input	Unit	Quantity	Costs per Unit	Total costs per input	% of costs borne by land users
Labour	Labour	persons/day/ha	9.5	1.9	18.05	100.0
Construction material	Trash	ha	1.0	320.0	320.0	100.0
Total costs for maintenance of the Technology					338.05

4.8 Most important factors affecting the costs

Describe the most determinate factors affecting the costs:

cost of farmyard manure, labour, steep slopes

5.1 Climate

5.2 Topography

Comments and further specifications on topography:

Slopes on average: Also steep

Landforms: Also footslopes

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 depth on average: Also shallow

Soil fertility is medium

Soil drainage / infiltration is medium

Soil water storage capacity is medium

5.6 Characteristics of land users applying the Technology

Indicate other relevant characteristics of the land users:

2% of the land users are very rich and own 30% of the land.
5% of the land users are rich and own 10% of the land.
43% of the land users are average wealthy and own 40% of the land.
30% of the land users are poor and own 15% of the land.
20% of the land users are poor and own 5% of the land.

Level of mechanization: Manual labour with hand hoes and animal traction used for transport

5.7 Average area of land owned or leased by land users applying the Technology

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

Land ownership:

• individual, not titled

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Production

Socio-cultural impacts

Ecological impacts

Soil

Other ecological impacts

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

• 1-10%

If available, quantify (no. of households and/ or area covered):

10 household covering 5 percent of the area (5 percent of all land users)

Of all those who have adopted the Technology, how many have did so spontaneously, i.e. without receiving any material incentives/ payments?

• 90-100%

Comments:

10 land user families have adopted the Technology without any external material support

There is a little trend towards spontaneous adoption of the Technology

Comments on adoption trend: because of the badly eroded gullies and heavy earth work

6.7 Strengths/ advantages/ opportunities of the Technology

Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view
heals the gully How can they be sustained / enhanced? make use of live barrier
grow crops in the gully How can they be sustained / enhanced? increased crop production
reduce floods downstream How can they be sustained / enhanced? downstream users can make use of the floods

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

Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view	How can they be overcome?
if upstreamusers have no innovation floods are not easy to control	if upstreamusers have no innovation floods are not easy to control