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

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:

Ja

1.5 Reference to Questionnaire(s) on SLM Approaches (documented using WOCAT)

Paddy Field Terrace [Indonesia]

Subak : Organization established by farmers to maintain irrigation systems, paddy field terrace, and irrigation water distribution.

• Compiler: Philippe Zahner
• 01/21/2009 middernag

2.1 Short description of the Technology

Definition of the Technology:

Bench Terrace for Paddy Field

2.2 Detailed description of the Technology

Description:

Combination of conservation technologies. Structure: Bench Terraces, drainage Agronomic : Ridges

2.3 Photos of the Technology

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

Country:

Indonesia

Region/ State/ Province:

Bali

Specify the spread of the Technology:

• evenly spread over an area

If precise area is not known, indicate approximate area covered:

• 1,000-10,000 km2

Map

×

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.):

Ancestors

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

Cropland

• Annual cropping

• rice

Number of growing seasons per year:

• 2

Specify:

Longest growing period from month to month: Oct - Mar

Comments:

Major land use problems (compiler’s opinion): Steep slope, High cost, agricultural management

Major land use problems (land users’ perception): High cost management

3.5 SLM group to which the Technology belongs

• cross-slope measure
• irrigation management (incl. water supply, drainage)

3.6 SLM measures comprising the Technology

agronomic measures

• A1: Vegetation/ soil cover
• A3: Soil surface treatment

structural measures

• S1: Terraces

Comments:

Type of agronomic measures: mixed cropping / intercropping, contour tillage

3.7 Main types of land degradation addressed by the Technology

soil erosion by water

• Wt: loss of topsoil/ surface erosion

chemical soil deterioration

• Cn: fertility decline and reduced organic matter content (not caused by erosion)

4.1 Technical drawing of the Technology

4.2 General information regarding the calculation of inputs and costs

If relevant, indicate exchange rate from USD to local currency (e.g. 1 USD = 79.9 Brazilian Real): 1 USD =:

8000.0

4.3 Establishment activities

4.5 Maintenance/ recurrent activities

4.7 Most important factors affecting the costs

Describe the most determinate factors affecting the costs:

cost for preparation and terrace maintenance in steep slope is higher than that.

5.1 Climate

5.2 Topography

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 is medium - high

Topsoil organic matter: Most of crop residue was incorporated to the soil at the time of ploughing

Soil drainage / infiltration is good - medium

Soil water storage capacity is medium - high

5.6 Characteristics of land users applying the Technology

Indicate other relevant characteristics of the land users:

Population density: 100-200 persons/km2

Annual population growth: 1% - 2%

Off-farm income specification: income from handy craft

Level of mechanization: When the width of the terrace is wide enough animal traction is possible

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

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

130 households

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

• 51-90%

Comments:

50 land user families have adopted the Technology with external material support

Comments on acceptance with external material support: estimates

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

Comments on spontaneous adoption: estimates

There is a little trend towards spontaneous adoption of the Technology

7.1 Methods/ sources of information