1. soil wets up during rain
organic matter
soil wets up during rain
air
soil dries
down
mineral
matter
water
solids
pores
Figure 5.1. Distribution of solids and pores in soil.

3. Figure 5.3.

4. a) sand b) dense clay c) aggregated loam
wilting point
field capacity
plant-available water
a) sand
unavailable water
gravitational water
b) dense clay
plant-available water
unavailable water
gravitational
water
c) aggregated loam
unavailable water
plant-available water
soil water content
saturation
Figure 5.4 Water storage for three soils. (Shaded area represents water stored in soil that is available for plant use.)