Fertilisers

Give one, get one – what do you know about fertilisers?

Watch the following clip about...

Fertilisers – name the 3 minerals found in fertilisers? - What two methods are used on this organic farm

instead?

FertilisersFertilisers contain nitrogen (N),

phosphorus(P) and potassium (K).

The absence of any of these minerals willreduce growth in the plant.

Each packet has a ratio which needs to be simplified to a whole

number ratio...Miragrow

Excellent for leafy green grass and veg.

NPK ratio 14:6:2

Each packet has a ratio which needs to be simplified to a whole

number ratio...Supergrow

The number one fertiliser for fruit trees and flowers.

NPK ratio 27-3-9

Each packet has a ratio which needs to be simplified to a whole

number ratio...

GreengrowGrowing potatoes? This is the fertiliser for you!!

NPK ratio 4-36-12

Fertilisers• Natural fertilisers include spreading

manure and growing clover in the fields.

• Artificial fertilisers are chemicals.

Fertilisers

Natural ArtificialLess Pollution Likely to cause

pollution in water courses.

Low cost High cost.NPK composition

is variable.Composition more

reliable.

What do you think causes this?

Watch the following clip about...

How do fertilisers cause algal blooms?

Put these in order...1. Chemicals leach into water2. Fish die3. Overuse of fertilisers4. Oxygen levels decrease5. Algal bloom develops

Today we will be learning about…

• The steps of the Nitrogen Cycle.

• How feedback can help to improve our learning.

Mind map

Create a mind map showing what you already know about feedback.

The Nitrogen Cycle

Watch the following clip about the nitrogen cycle and create a sequence of the main steps.

Time for feedback!

• Your partner will give you feedback on how to improve your sequence.

• Act on the feedback you have received.

Nitrogen in plants

(protein)

Nitrogen in animals (protein)

Nitrogen in waste and

dead bodies (e.g. urine)

Nitrogen gas in the air

Nitrogen in ammonium compounds

in soil

Nitrogen in nitrites in the soil

Nitrogen in nitrates in

the soil

Dentrification by bacteria

Nitrogen fixation (by bacteria)

Death

Animal Nutrition

Excretion and death

Absorption by roots

Decomposition by bacteria

Nitrification by bacteria

Nitrification by bacteria

START HERE

Nitrogen fixation (by bacteria)

Now try the card sort...

Time for feedback!

• Your partner will give you oral feedback on how to improve your sequence.

• Be kind, helpful and specific.

• Act on the feedback you have received.