Key area 5 - Food production

Cards (11)

Why is increased food yield needed
Because of the increase of the human population
How to fertilisers help to increase yield
They are added to the soil to help increase the nitrate content therefore increasing the crop yield
How do pesticides increase yield
They get rid of unwanted animals that eat the crops and therefore increasing yield
How do plants obtain nitrates
From soil water via their roots
What elements do fertilisers supply
Nitrogen - Phospheros - potassium
Why do plants need nitrates
They need amino acids to make proteins
How do animals make their protein
Consume other animals or plants
What can be added to soil to increase nitrate content
Fertilisers
What can be used to reduce the use of fertilisers
Genetically modified crops
Describe bioaccumulation
when pesticides are sprayed onto crops they accumulate in organisms bodies overtime. This is the build up of toxicity
Name 2 alternative to the use of pesticides
biological control
genetically modified crops