fig 1. surface ph against time
Post on 30-Dec-2015
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Fig 1. Surface pH against time.
91 92 93 94 95 96 97 98 99 00 01 02
Year
pH 7.2
7.4
7.6
7.8
8.0
8.2
8.4
8.6
8.8
Figure 2: Conductivity of soil water against timeC
ondu
ctiv
ity,
mS
cm
-10
2
4
6
8
10
12
91 92 93 94 95 96 97 98 99 00 01 02
Year
Figure 2. Conductivity of soil water against time. The declining phase is modelled by the function y = 4.69*exp(-0.29*(year-1993))hence T½ = 2.4 years
Figure 3: Soil mass loss on ignition vs time
91 92 93 94 96 97 98 00 01 02
Year
% L
oss
on ig
niti
on0
5
10
15
20
Figure 4. Soil surface pH and organic matter as a function of fertiliser treatment.
None Chemical Organic Fertiliser treatment
p
H7.
9
8
.0
8.1
8
.2
8.3
10
1
1
12
13
%L
OI
aa
b
ab
cb
Figure 5: Soil nitrate against distance from site centre at the final harvest in 2002
0 5 10 15distance from centre of site, m
NO
3, m
g 10
0g-1
0
0
.25
0.
5
0.75
1.0
cc
y = 0.19 + 0.016*Xr = 0.33**
Fig 6: % Plant cover against time as a function of initial fertilizer treatment
Control
Chemical
Manure
91 92 93 94 95 96 97 98 99 00 01 02
Year
Mea
n %
cov
er, b
ars
show
1s.
e.0
2
0
40
60
8
0 1
00
Figure 7. DCA ordination of the floral data
ApCr
Sm
VcHr
Fa
Hl
Lc
Ca
Lc
Pm
Mo
Fh
-100 0 100 200 300 400 500
1st DCA axis (Eigenvalue = 0.599)
-100
0
10
0
200
300
4
00
Bgc
2nd
DC
A a
xis
(Eig
enva
lue
= 0
.265
) Key
91-94
95-98
99-02
Lg
Dc
Di Vt
Vm
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