#212Vermicompost
212⸱AConcept
Benefits
- Improves soil structure and organic matter
- Improves soil life
- Improves plant nutrition
- Increases the coffee yield
Vermicompost is an earthworm-generated high-quality compost. It is a nutrient-rich biological fertilizer used in addition to or replacing mineral fertilizers. Its beneficial biological and nutritional properties enhance soil and plant health, accelerate their growth, and improve yields.
Vermicompost is produced in specially designed bins, pits, or beds. The organic base that serves as feedstock for composting worms consists of organic wastes such as greens, manures, coffee pulp and husks, and cardboard or straw. These materials are partly pre-composted, chopped or shredded, mixed, moistened, and layered. Then the composting worms are added. The worms chew, eat, mix, and aerate the waste. The mixture is kept moist, shaded, and at ambient temperature. After finishing the feed, the earthworms leave the mature compost and move towards new fodder.
Worm castings (vermicompost) and the protective mucus covering the worm skins are rich in nitrogen (N) in forms of proteins, plant-available ammonium, and urea, as well as phosphorous (P) and potassium (K), calcium (Ca) and Magnesium (Mg). They also contain enzymes, growth-stimulating hormones, and beneficial microorganisms. These properties feed and maintain both plants and soil life, creating a healthy growing environment. Vermicompost is a stable fertilizer which, contrary to synthetic fertilizers, is not easily washed out of the soil into the ground water.
After setting it up and having learnt how to manage it, the process is simple, efficient and cost-effective. In addition to obtaining the compost, excess worms can be used as animal feed (fish, poultry, pigs).
Applied to the soil, vermicompost is especially beneficial in nurseries because it stimulates plant growth and resilience against pathogens. Vermiwash, the liquid leachate from vermicomposts, has similar beneficial properties and can equally be used as a liquid soil or leaf fertilizer to prevent disease and to promote healthy growth.
Vermicomposting can be carried out at different scales, depending on the intended purpose. This tool explains medium-scale production in worm beds or pits with shade roofing. It is suitable for farm level and can be scaled up easily. The worm bed is constructed from locally made materials such as concrete, bricks, bamboo, timber or strong polyethylene (e.g. lorry tarpin) with a metal framing. Larger commercially available vermicompost units have several compartments with partition walls with small holes, allowing the worms to migrate from one compartment to the next.
Small-scale vermicompost production in kitchen bins or household composting containers is primarily applied for home gardens. For further information, please refer to Vermicompost for vegetable gardens.
212⸱DEconomic benefits
Lower fertilizer costs
This tool allows for a lower demand for synthetic fertilizers and therefore saves input costs over time.
Higher coffee yield
The effects of this tool can lead to a higher coffee yield and therefore a higher income.
Re-use of waste
The economic potential is particularly high if the waste products that serve as tool ingredients are produced on the farm or in the neighborhood, for example, manure from own cattle, straw or wood from the own field. Furthermore, by utilizing waste, this tool helps reduce landfill fees.
Additional income source
This tool has the potential to provide an additional income.
212⸱EGreen benefits
Less synthetic fertilizers needed
This tool reduces the need for syntheticfertilizers. This reduces carbon emissions and water pollution, improves soil life, and saves resources.
Better soil life
This tool helps improve soil life (microbes, earthworms, etc.). This plays a vital role in plant nutrition and contributes to a healthy ecosystem.
Resilience to climate stress
This tool helps balance soil health, contributing to coffee plants to tolerate drought, heat, and disease pressure more effectively, supporting climate adaptation strategies.
Re-use of waste
Reusing organic waste material in a circular economy saves resources from being discarded. This reduces the environmental load, carbon emissions, and water pollution.
