1
Q
Saturation point
A
When all pore spaces are filled with water - there is no air.
Most plants can’t grow in these conditions
2
Q
Field capacity
A
The water that remains when all gravitational water has drained away - optimal growing conditions
3
Q
Permanent wilting point
A
The point that plants will wilt due to lack of water
PWP is reached sooner on sandy soils compared to clay
4
Q
Available water content
A
The difference between field capacity and permanent wilting point.
The difference in water when the soil has lost all the water it held at FC.
5
Q
Soil moisture deficit
A
The amount of water needed to be added to restore the FC
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