EU Climate Cafe Newsletter 2

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Is bio- slurry from household digesters a better fertilizer than manure? A literate review.

Abstract
In many developing countries manure is anaerobically digested to produce biogas. The residue of manure digestion, bio-slurry, can be used as fertilizer for crop production and aquaculture. This study compared bio-slurry and manure as fertilizers. Nutrients in bio-slurry, especially nitrogen, are more readily available then in manure, leading to a larger short term fertilisation effect. However, risks for N losses through volatilisation and leaching are large for bio-slurry than for manure during
storage, handling and application. Unfortunately, most studies that compared bio-slurry and manure exhibited methodological shortcomings that hamper an adequate comparison.

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At the heart of soil quality for sutainable green land uses

NMI is an independent research and consulting firm for the development, application and dissemination of expertise on soil quality and soil management.

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