C2 - Fertilizers and crop yield Flashcards
1
Q
Why do fertilizers make crops grow bigger and faster?
A
They contain the essential elements plants need.
2
Q
What are the three essential elements?
A
- nitrogen
- phosphorus
- potassium
3
Q
What must happen to fertilizers in the soil before they can be absorbed by plants?
A
They must be dissolved in water.
4
Q
What is the process of making a fertilizer?
A
1) pour alkali into a connical flask
2) add acid to the alkali until it is neutral
3) evaporate
4) filter off the crystals
5
Q
What substance is produced when phosphoric acid reacts with ammonia?
A
Ammonium phosphate.
6
Q
What is a nitrogenous fertilizer?
A
A fertiliser containing nitrogen.
