Fertilisers

Question 1

What are the most important minerals needed by plants?

Answer 1

Nitrogen, phosphorus and potassium

Question 2

What form do NPK need to be in?

Answer 2

Soluble form

Question 3

Why do farmers need to add fertiliser to their field?

Answer 3

Harvesting crops removes essential nutrients. Adding fertiliser replaces the nutrients that have been lost in plant growth, it also increases crop yield as plants grow better

Question 4

What are natural fertilisers?

Answer 4

Waste materials produced by living organisms

Question 5

Give examples of Nat fertilisers (3)

Answer 5

Manure, plant waste like straw, guano

Question 6

What are artificial fertilisers?

Answer 6

Chemicals which are produced in factories

Question 7

What do art fert have?

Answer 7

Very specific combinations of different chemicals known as the N:P:K ratios

Question 8

Why is the N:P:K ratio of art fert important?

Answer 8

They suit different crops/plants