A Catalyst article about what happens as plants grow. During
their growth, plants remove compounds of nitrogen, phosphorus
and potassium from soil which need to be replaced to maintain
the soil’s fertility. For centuries farmers have used organic
manures, crop rotation or ploughed in specially grown crops;
today many use chemical fertilisers to enrich the soil, the
article looks at their use. This article is from Catalyst: GCSE
Science Review 2004, Volume 14, Issue 3. Catalyst is a science
magazine for students aged 14-19 years. Annual subscriptions to
print copies of the magazine can be purchased from Mindsets.
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