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:

Yes

1.4 Declaration on sustainability of the described Technology

Is the Technology described here problematic with regard to land degradation, so that it cannot be declared a sustainable land management technology?

No

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

Productive development and food security programme [Nicaragua]

An integrated programme-based approach promoting participatory testing and extension of various SWC technologies, as well as providing institutional support.

• Compiler: Philippe Zahner
• 01/16/2009 midnight

2.1 Short description of the Technology

Definition of the Technology:

Continuous breeding of earthworms in boxes for production of high quality organic compost.

2.2 Detailed description of the Technology

Description:

Vermiculture is a simple and cheap way to produce a continuous supply of organic compost of high quality. Eisenia foetida, the Red Californian earthworm (also called ‘the red wiggler’) is ideal for vermiculture since it is adapted to a wide range of environmental conditions. Under culture, the worms are kept under shade, in long wooden boxes filled with earth, cattle manure and an absorbent material (eg straw). The box is covered by sheet metal (or wood, thick plastic sheeting, or banana leaves) to protect the worms against UV radiation and birds/chickens, and also to maintain a favourably humid microclimate. Fresh cattle manure is a perfect food for the worms, but rotten coffee pulp can also be fed. Chopped crop residues (eg cowpeas, leucaena leaves or other legumes) may be added.

The compost produced by the earthworms has a dark colour, no smell and a loose and spongy structure. It is a high value, high quality product which is very rich in nutrients, and in a form that makes them readily available to vegetation. The content of a full box can be harvested every 3-4 months, and is used for crops -mainly coffee and vegetables, but also maize and beans. It is very effective in increasing soil fertility and thus crop production. It also improves soil structure, infiltration and water storage capacity.

The compost can either be applied directly to coffee, mixing it with an equal amount of earth and applying 1 kg to each plant. Alternatively it can be sprayed: for preparation of liquid fertilizer 50 kg compost are mixed with 50 litres of water and left to soak for 5 days. The concentrated solution produced is mixed with water at a ratio of 1 to10 and applied to the crop using a knapsack sprayer. The earthworms reach their reproductive age after three months and live for many years. In perfect conditions an earthworm produces up to 1,500 offspring per year. Thanks to their rapid reproduction, new cultures can easily be established, or earthworm stocks can be sold according to the farmer’s needs. A certain amount
of earthworm compost is kept back and being used instead of fresh earth to reinitiate the whole process, or to start new cultures.

The area is characterised by humid climate, steep slopes and low soil fertility. Farmers are mainly smallholders with individual properties. Earthworm culture does not depend closely on the external environment, but it is essential to maintain favourable conditions inside the box - namely continuous feeding and wetting. That’s why it is usually recommended to keep cultures near the house and the home-garden. Ants, the main enemy of earthworms, can be controlled standing the boxes on poles in cans filled with water.

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:

Nicaragua

Region/ State/ Province:

Matagalpa

Further specification of location:

Matiguas, Pancasán

Comments:

Total area covered by the SLM Technology is 5 m2.

Map

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2.7 Introduction of the Technology

Specify how the Technology was introduced:

• through projects/ external interventions

3.1 Main purpose(s) of the Technology

• preserve/ improve biodiversity

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

Cropland

• Annual cropping
• Perennial (non-woody) cropping

Number of growing seasons per year:

• 1

Specify:

Longest growing period in days: 300, Longest growing period from month to month: May untill February

Comments:

Major land use problems (compiler’s opinion):
- low crop yields due to soil fertility decline
- water and wind erosion
- small landholdings

3.4 Water supply

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

• rainfed

3.5 SLM group to which the Technology belongs

• integrated soil fertility management
• beekeeping, aquaculture, poultry, rabbit farming, silkworm farming, etc.

3.6 SLM measures comprising the Technology

agronomic measures

• A4: Subsurface treatment

Comments:

Type of agronomic measures: manure / compost / residues

3.7 Main types of land degradation addressed by the Technology

chemical soil deterioration

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

Comments:

Main causes of degradation: soil management, deforestation / removal of natural vegetation (incl. forest fires), overgrazing (on a single cattle farm), poverty / wealth (lack of capital)
Secondary causes of degradation: over-exploitation of vegetation for domestic use, other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (impacts of hurricane Mitch), governance / institutional (lack of strenght of law and authorities), inter-generational subdivision of land

3.8 Prevention, reduction, or restoration of land degradation

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

• reduce land degradation

4.1 Technical drawing of the Technology

4.4 Costs and inputs needed for establishment

Comments:

Duration of establishment phase: 0.07 month(s)

4.5 Maintenance/ recurrent activities

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

Comments:

Machinery/ tools: hammer, nails, buckets/wheelbarrow, shovel, possibly water hose, hammer, nails, buckets/wheelbarrow, shovel, possibly water hose

60% of the land users have their own cattle, others get manure free from their neighbours. The cattle manure has no commercial price in the region - there is no market for it. The inputs and costs are estimated for the production of approx. 4,000 kg of worm compost, which is enough for one hectare of coffee per year (note figures from India for vermiculture suggest higher input-output ratios: in other words less output for the same amount of input).

5.1 Climate

5.2 Topography

5.3 Soils

5.6 Characteristics of land users applying the Technology

Indicate other relevant characteristics of the land users:

Off-farm income specification: nearly all land users are fully occupied with agricultural activities, very few are involved in commerce or are employed

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:

• individual, not titled
• individual, titled

Land use rights:

• leased
• individual

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Production

Income and costs

Socio-cultural impacts

Ecological impacts

Soil

Biodiversity: vegetation, animals

6.2 Off-site impacts the Technology has shown

6.5 Adoption of the Technology

Comments:

88 land user families have adopted the Technology with external material support
6 land user families have adopted the Technology without any external material support
There is a little trend towards spontaneous adoption of the Technology. As ADDAC (the Association for Agricultural Community Development and Diversification) has a permanent and longterm presence in the approach area, most interested farmers are directly involved in the programme activities: this explains the fact that only 5% of the technology users (6 people) took up earthworm culture without incentives (see approach).

6.7 Strengths/ advantages/ opportunities of the Technology

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

7.1 Methods/ sources of information

7.2 References to available publications

Title, author, year, ISBN:

PASOLAC. Guía Técnica de Conservación de Suelos y Agua.. 2000.

Available from where? Costs?

PASOLAC, Managua

Title, author, year, ISBN:

Ferruzzi C. Manual de Lombricultura. Ediciones Mundi-Prensa. Madrid, Spain. 1986.

Title, author, year, ISBN:

Castillo H . La lombricultura. in Altertec. Alternativas de Mejoramiento de Suelos.Proceso de Capacitación para Profesionales. Modulo II. Altertec, Ciudad de Guatemala. 1994.