We found that vermicompost brought about average increases of 26% in commercial yield, 13% in total biomass, 78% in shoot biomass, and 57% in root biomass. This is the first meta-analysis providing a quantitative summary of the effect size of vermicompost on plant growth. Many studies have evaluated the effect of vermicompost on plant growth, but a quantitative summary of these studies is still missing. Vermicomposting is a process whereby earthworms transform organic residues into compost that can be used as a substrate for plant growth. Recycling organic residues into amendment for food production seems to appear as an opportunity to partially solve this double challenge.
Food production and waste management are two increasing issues ensuing from the growing world population.
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