Appendices - Soil Essentials: Managing Your Farm's Primary Asset - page 166

Appendix 21. Plant-soil-water relationships
Source: Dubbin (2001).

As soil water content decreases, less water is in contact with the root surface.

Wet soil Dry soil

Field capacity, permanent wilting point and available water vary with soil texture.

40

field capacity

32

24

available water

16

permanent wilting point

8

unavailable water

0

sand sandy

loam

loam silty

loam

clay
loam

clay

Soil texture