Environmental Engineering Reference
In-Depth Information
are. important. in. ensuring. high. survival. rates. of. tree. seedlings. in. ield.
experiments..Establishment.is.enhanced.by.deep.ripping.which.allows.roots.
to.proliferate.deep.into.the.soil.and.adequately.covering.roots.to.remove.air.
pockets.which.can.cause.desiccation.(Falkiner.et.al..2004).
Survival. of.
E. viridis
. was. most. detrimentally. affected. by. growth. in. the.
biosolids.amendments..This.species.has.the.smallest.leaves.and.tends.to.have.
the. most. prostrate. form. of. the. four. trial. species.. Vigorous. pasture. growth.
% Cracking
0
20
40
60
80
100
-20
+
+
-40
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ +
+
+
+
+ +
+
+
+ +
+ +
+ +
+
+ +
+
+
+ +
+
+
+ +
+
-60
+
+ +
+
+
+ +
+
+
+ +
+
+ +
+ +
+
+
+
+ +
++
+
+
+ +
+ +
+
+
Root diameter
<1 mm
<2 mm
<5 mm
>5 mm
% cracks
-80
+ + + + + + + + + +
-100
0
50
100
Root density in 0.01 m
2
150
200
(a)
% Cracking
0
20
40
60
80
100
-20
-40
-60
Root diameter
<1 mm
-80
<2mm
<5 mm
>5 mm
% cracks
-100
0
50
100
Root density in 0.01 m
2
150
200
(b)
FIGURE 20.6
Depth.distribution.of.
E. cladocalyx
.roots.in.(a).10.cm.biosolids;.(b).5.cm.biosolids;.
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