Biology A-Level
ion availability
What ion availability means in Biology A-Level, as defined for AQA.
Definition of ion availability
Check what you remember
Read the wording for your board, then hide it and explain ion availability in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Whether the ions a fertiliser contains can be taken up at once, which is slow and sustained for organic matter but immediate for inorganic salts.
Topics that use ion availability
- Nutrient cycles (A-level only) (AQA A-Level)
Related terms
- algal bloom
- ammonification
- artificial fertilisers
- decomposers
- denitrification
- eutrophication
- extracellular digestion
- leaching
Using ion availability in the exam
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