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loam
clay
2
4
6
8
10
12
14
16
18
2
4
6
8
10
12
14
16
18
0.0
0.0
-0.4
-0.4
C
15
30
C
15
30
-0.8
-0.8
-1.2
-1.2
-1.6
-1.6
C
15
30
C
15
30
0.8
0.8
0.4
0.4
0.0
0.0
2
4
6
8
10
12
14
16
18
2
4
6
8
10
12
14
16
18
hours
Figure 3. Pre-dawn leaf-water potential (PLWP) and stomatal conductance (gs) observed during the
daytime (day 64 D.A.S) on loam and clay soils for three water-quality treatments (control C, 15 and 30
meq/l).
loam
clay
2 4 6 8 0 2 4 6 8
2
4
6
8
10
12
14
16
18
0.0
0.0
-0.3
C
15
30
-0.3
C
15
30
-0.6
-0.6
-0.9
-0.9
-1.2
-1.2
-1.5
-1.5
-1.8
-1.8
C
15
30
0.8
0.8
C
15
30
0.4
0.4
0.0
0.0
2
4
6
8
10
12
14
16
18
2
4
6
8
10
12
14
16
18
hours
Figure 4. Pre-dawn leaf-water potential (PLWP) and stomatal conductance (gs) measured during the
daytime (day 76 D.A.S) on loam and clay soils for three water-quality treatments (control C, 15 and 30
meq/l).
The leaf-water potential decreased after dawn, attained a minimum around 14h, and
increased again afterwards. The stomatal conductance increased during the morning, attained
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