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Earthworms are one of the most important members of the soil food web. Earthworms dramatically alter soil structure, water movement, nutrient dynamics, and plant growth. They are not essential to all healthy soil systems, but their presence is usually an indicator of a healthy system. Earthworms perform several beneficial functions like mixing and aggregating soil, increasing infiltration, improving water-holding capacity of soil, providing channels for root growth, enhancing fertility of the soil, etc. Therefore it is important to study earthworms and their association other organisms of the soil ecosystem is important.The aim of this study is to: (1) Determine the relationship between soil microbiology, that is, the absence or presence of microbes as food source; and the absence or presence of earthworms. (2) Determine the most suitable habitat for growth of earthworm populations; i.e. compost piles, grassy areas, or forest floors. Soil samples were collected from three sites: a compost pile, a grassy area and a forest floor. The number of earthworms in the samples was recorded. The samples were also inoculated on different media that support the growth of bacteria and fungi. Depending on the number of colonies that grew on the media, conclusions were drawn as to which soil was most preferable for earthworms to grow.
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