| Description
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Compost tea is a liquid extract or a dissolved solution but not simply a suspension of compost. It is made by steeping compost in water for 3–7 days. It was discovered in Germany and became a practice to suppress foliar fungal diseases by nature of the bacterial competition, suppression, antibiosis on the leaf surface (phyllosphere). It has also been used as a fertilizer although lab tests show it is very weak in nutrients with less than 100ppm of available nitrogen and potassium. Other salts present in the tea solution are sodium, chlorides and sulfates. The extract is applied as a spray to non-edible plant parts such as seedlings, or as a soil-drench (root dip), or as a surface spray to reduce incidence of harmful phytopathogenic fungi in the phyllosphere.
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| Technology for the Application of
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| ☐ Solar
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☑ Biomass
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☐ Biofuel
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| ☐ Biogas
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☐ Wind
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☐ Geo-Thermal
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| ☐ Hydro
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☐ Energy Efficiency
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| ☐ Other: /
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| Primarily Relevant for the following Agricultural Value Chain Steps
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| ☐ Mechanization
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☐ Efficiency of Operation
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☐ Processing
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| ☐ Transportation
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☐ Controlled Atmosphere
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☐ Controlled Temperature
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| ☐ Mechanical Sorting
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☐ Preservation
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| ☑ Other: Cultivation
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| Primarily Relevant for the following Agricultural Value Chain Activities
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| ☐ Grinding
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☐ Hauling and conveying
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☐ Sorting
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| ☐ Seedbed Preparation
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☐ Milling
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☐ Tearing
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| ☐ Planting
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☐ Washing
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☐ Mixing
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| ☐ Pumping
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☐ Heating
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☐ Drying
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| ☐ Irrigation
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☐ Cooling
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☐ Animal feeding
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| ☑ Fertilizing
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☐ Venting
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☐ Animal health and Welfare
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| ☑ Pest Management
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☐ Lighting
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☐ Packing and branding
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| ☐ Cutting
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☐ Sanitation
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| ☐ Other: /
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| Primarily Implemented in the following Commodity Groups
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| ☐ Cereals
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☑ Fruits and vegetables
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☐ Nuts and berries
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| ☐ Forage
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☐ Dairy products
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☐ Meat products
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| ☐ Oil Seeds
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☑ Roots and Tubers
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☐ Eggs
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| ☐ Pulses
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☐ Fiber Crops
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☐ Forestry
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| ☐ Sugars
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☑ Stimulants
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☐ Spices
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| ☐ Other: /
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Region & Country of
Development
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Region
☐ Africa
☐ South Asia
☐ East Asia & The Pacific
☑ Europe & Central Asia - Germany
☐ Latin America & The Caribbean
☐ Middle East & North Africa
☐ North America
☐ N/A: /
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Region & Country of
Current Deployment
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Region
☐ Africa
☐ South Asia
☐ East Asia & The Pacific
☑ Europe & Central Asia
☐ Latin America & The Caribbean
☐ Middle East & North Africa
☑ North America
☐ N/A: /
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Region & Country of
Potential Deployment
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Worldwide
☑ Africa
☑ South Asia
☑ East Asia & The Pacific
☑ Europe & Central Asia
☑ Latin America & The Caribbean
☑ Middle East & North Africa
☑ North America
☐ N/A: /
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| Manufacturers
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Sustainable Agricultural Technologies, Inc. (http://composttea.com/)
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| Economics
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| Technology Development Level
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Pilot projects and first implementations;
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| Required Maintenance Technical Level
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Low: Technology to be maintained through its life cycle requires less common tools and/or training is required for maintenance;
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| Required Infrastructure for Deployment
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Low: Technology can be developed with less common tools, low development level supporting technologies and moderately trained personnel; Education and training required;
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| Required Resources during manufacture
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Metal, plastics, electronics, air pump;
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| Required Resources during operation
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Electricity;
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Deployment
Level
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Local availability;
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| Deployment Capability and Potential
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The technology can be deployed worldwide;
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| Requirements for Deployment
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The technology can be widely deployed but resources or material supply and distribution chains are required; Education and training required;
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| Relevance for Autonomy and Food Security
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High;
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| Environment Impacts (emissions)
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Low: no direct emissions (when operated with renewable energies) but indirect emissions; Composting emits CO2, CH4 and N2O, so a composting method with low emissions should be selected;
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| Conformity with Bio- Cybernetic System Rules
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Yes;
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| Additional information / Comments
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No comments.
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| Internal Reference
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| Additional Links
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http://en.wikipedia.org/wiki/Compost#Compost_tea
http://www.nofanj.org/LiteratureRetrieve.aspx?ID=104151
http://composttea.com
http://elaineingham.com/
http://compostguide.com/compost-tea/
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