Soil profile. Image credit

Soil profile. Image credit

ZIMSEC O Level Combined Science Notes: Ecosystems: The soil


  • Soil is an important part of the ecosystem
  • It is a critical component of life on earth and agriculture
  • Soil thickness varies from a few millimeters to a several meters in places
  • Animals and plants interact with one another and with weathered rocks to form the soil
  • Micro-organisms in the soil carry out recycling activities which release nutrients for plants to absorb
  • The soil acts as a source of water and nutrients for plants
  • The components of the soil can be divided into physical and biological components

To access more topics go to the Combined Science Notes page.

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