Fertilisers Flashcards
1
Q
What does fertilizer do?
A
Replaces the missing nutrients.
2
Q
What do NPK fertilizers contain?(3)
A
- Nitrogen for growth of leaves and stems
- Phosphorus for healthy roots
- Potassium for healthy leaves and flowers
3
Q
Both _____ and _____ help reactions in photosynthesis and _____ to work.
A
Phosphorus
Potassium
Respiration
4
Q
What are proportions of NPK?
A
25:0:16
5
Q
Why are artificial and chemical fertilizers used in huge amounts?
A
Easy to store and add to the land.
6
Q
Can fertilizers cause pollution?
A
Yes rain can wash fertilizers into rivers and streams where it causes water pollution.
7
Q
Why do farmers prefer natural fertilizers?
A
They add humus to the soil. And it rots down and release nutrients more slowly.
8
Q
What is the problem of natural fertilizers?
A
Farmer doesn’t know the amount of each nutrient in the fertilizer is not known.
