SB4i: Biological Control And Fertilisers Keywords

Question 1

Biological control

Answer 1

Using living organisms to kill problem organisms such as pests or weeds.

Question 2

Fertiliser

Answer 2

Substances that add plant nutrients to soil, such as artificial fertilisers containing nitrogen compounds, or manure (a natural fertiliser made from animal waste).

Question 3

Pollution

Answer 3

Harm caused to the environment, for example by the addition of poisonous substances or by abnormally
high amounts of a substance.

Question 4

Weeds

Answer 4

Plants that are growing where they are not wanted, and where they cause problems such as competing with crop plants for light, water and nutrients.