RelativeResourceManager.page12 - - tillage- use of certain...

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NRES 201 Intro Soil Science Lec. 25-26 Soil Organisms Ch. 10 3/4/2007 12 Earthworms Earthworms prefer: - moist, well aerated soils, especially subsoils - soil pH values of 5.0 to 8.4 - medium to fine textured soils - medium to high soil organic matter levels - low salt contents Earthworms Earthworm populations are decreased by:
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Unformatted text preview: - tillage- use of certain pesticides- poorly drained subsoils, strong soil acidity Earthworms- Their digestive processes initiate the decay process and also increase the solubilities of soil minerals.- Earthworm casts are enriched compared to soil.- Form earthworm middens...
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