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Bulk soil is soil outside the rhizosphere. Bulk soil is not penetrated by plant roots. Natural organic compounds are much lower in bulk soil than in the rhizosphere.[1] Microbial populations are typically lower in bulk soil than in rhizospheric soil. Furthermore, bulk soil inhabitants are generally smaller than identical species in the rhizosphere.[2]

ReferencesEdit

  1. ^ Stotsky, G. (2000). Soil Biochemistry. CRC Press. p. 207. ISBN 978-0-8247-9441-5. Volume 9.
  2. ^ Stotsky, G. (1996). Soil Biochemistry. CRC Press. p. 234. ISBN 978-0-8247-8834-6. Volume 10.