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Technologies
Inactive

Paddy Field Terrace [Indonesia]

Huma

technologies_1082 - Indonesia

Completeness: 55%

1. General information

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

Key resource person(s)

SLM specialist:

1.3 Conditions regarding the use of data documented through WOCAT

When were the data compiled (in the field)?

01/12/2003

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

Yes

1.5 Reference to Questionnaire(s) on SLM Approaches

Paddy Field Terrace
approaches

Paddy Field Terrace [Indonesia]

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

  • Compiler: Philippe Zahner

2. Description of the SLM Technology

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

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. Classification of the SLM Technology

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

Cropland

  • Annual cropping
Comments:

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

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

3.3 Further information about land use

Number of growing seasons per year:
  • 2
Specify:

Longest growing period from month to month: Oct - Mar

3.4 SLM group to which the Technology belongs

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

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:
  • 1,000-10,000 km2

3.6 SLM measures comprising the Technology

agronomic measures

agronomic measures

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

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

soil erosion by water

  • Wt: loss of topsoil/ surface erosion
chemical soil deterioration

chemical soil deterioration

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

4. Technical specifications, implementation activities, inputs, and costs

4.2 Technical specifications/ explanations of technical drawing

Technical knowledge required for field staff / advisors: moderate

Technical knowledge required for land users: moderate

Secondary technical functions: control of dispersed runoff: retain / trap, reduction of slope angle

Slope (which determines the spacing indicated above): 35.00%

If the original slope has changed as a result of the Technology, the slope today is (see figure below): 60.00%

Slope (which determines the spacing indicated above): 35%

If the original slope has changed as a result of the Technology, the slope today is: 60%

4.3 General information regarding the calculation of inputs and costs

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

8000.0

Indicate average wage cost of hired labour per day:

3.00

4.4 Establishment activities

Activity Type of measure Timing
1. establishment of terrace Vegetative
2. drainage ditch Vegetative
3. land preparation Vegetative
4. establishment of terrace Structural
5. Drainage ditch Structural
6. Land preparation Structural

4.6 Maintenance/ recurrent activities

Activity Type of measure Timing/ frequency
1. Land preparation Agronomic early season / before each season
2. Planting Agronomic
3. Maintenance Agronomic
4. Harvesting Agronomic
5. drainage maintenance Vegetative
6. terrace rizes maintenance Vegetative
7. drainage maintenance Structural
8. Terrace rizer maintenance Structural

4.8 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. Natural and human environment

5.1 Climate

Annual rainfall
  • < 250 mm
  • 251-500 mm
  • 501-750 mm
  • 751-1,000 mm
  • 1,001-1,500 mm
  • 1,501-2,000 mm
  • 2,001-3,000 mm
  • 3,001-4,000 mm
  • > 4,000 mm
Agro-climatic zone
  • humid
  • sub-humid

5.2 Topography

Slopes on average:
  • flat (0-2%)
  • gentle (3-5%)
  • moderate (6-10%)
  • rolling (11-15%)
  • hilly (16-30%)
  • steep (31-60%)
  • very steep (>60%)
Landforms:
  • plateau/plains
  • ridges
  • mountain slopes
  • hill slopes
  • footslopes
  • valley floors
Altitudinal zone:
  • 0-100 m a.s.l.
  • 101-500 m a.s.l.
  • 501-1,000 m a.s.l.
  • 1,001-1,500 m a.s.l.
  • 1,501-2,000 m a.s.l.
  • 2,001-2,500 m a.s.l.
  • 2,501-3,000 m a.s.l.
  • 3,001-4,000 m a.s.l.
  • > 4,000 m a.s.l.

5.3 Soils

Soil depth on average:
  • very shallow (0-20 cm)
  • shallow (21-50 cm)
  • moderately deep (51-80 cm)
  • deep (81-120 cm)
  • very deep (> 120 cm)
Soil texture (topsoil):
  • medium (loamy, silty)
  • fine/ heavy (clay)
Topsoil organic matter:
  • high (>3%)
  • medium (1-3%)
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

Off-farm income:
  • 10-50% of all income
Relative level of wealth:
  • average
  • rich
Level of mechanization:
  • manual work
  • animal traction
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. Impacts and concluding statements

6.4 Cost-benefit analysis

How do the benefits compare with the establishment costs (from land users’ perspective)?
Short-term returns:

very positive

How do the benefits compare with the maintenance/ recurrent costs (from land users' perspective)?
Short-term returns:

slightly positive

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 have did so spontaneously, i.e. without receiving any material incentives/ payments?
  • 50-90%
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

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