4. Fertiliser design and environmental impact Flashcards
1
Q
Artificial fertilisers
A
used to add nitrates to the soil to help plant growth
2
Q
Negative impacts of artificial fertilisers
A
can cause algal blooms
3
Q
Natural way to add more nitrates
A
adding manure to soil
4
Q
Negative impacts of natural fertilisers
A
can be expensive
5
Q
Clover
A
- good at making nitrates
- farmers sometimes grow it, then plough it into the soil
6
Q
Why do plants need minerals
A
for healthy growth
7
Q
Three minerals required
A
- Nitrogen (N)
- Phosphorus (P)
- Potassium (k)
8
Q
What do increased nitrates in water do?
A
increase algal growth
9
Q
What happens when there is too much algae
A
They die as they do not have enough light
10
Q
What does bacteria use up when decomposing algae
A
Oxygen
11
Q
What will happen to the other organisms
A
Die because of lack of oxygen
