fig 1. surface ph against time
DESCRIPTION
Fig 1. Surface pH against time. pH 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 8.8. 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)) - PowerPoint PPT PresentationTRANSCRIPT
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
