U3-3-1 - Fertilisers

Question 1

3 elements essential to plants

Answer 1

P, N, K

(phosphorus, nitrogen potassium)

Question 2

Which two properties must a fertiliser have?

Answer 2

1. Soluble in water
2. Contains one or more of P, N, K

Question 3

Example of a natural fertiliser

Answer 3

Manure, compost, etc

Question 4

Name the process caused by synthetic fertiliser use which is harmful for the environment

Answer 4

Eutrophication

Question 5

Briefly explain eutrophication

Answer 5

Synthetic fertiliser run off causes algal bloom in rivers and lakes, which is harmful to aquatic life.