35% -


30%


 25%


20%-


g 15%
eM


10% 1


5% -


0%-


0 1 2 3 4 5 6 7


 2.0 -

 1.8 -

 1.6 -

 1.4-


 do-
.^1.2 -

1.0-

=0.8 -

 0.6-

 0.4-

 0.2

 0.0


8 9 10 11 12 13 14 15 16 17 18 19


2
r = 0.35
p = 0.05


0 2 4 6 8 10
 Age


12 14 16 18 20


Figure 7.22. Average (a) Soil Organic Matter and (b) Bulk Density Plotted by Site
 Age.


7-80


I


I I I I I I I I I I I I I


iI


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