Campbell Scientific Sentek TriSCAN® Manual v 1.2a User Manual
Page 53
TriSCAN Manual Version 1.2a
Copyright © 1991 – 2004 Sentek Pty Ltd All rights reserved
Page 46
Table 11. Crop Tolerance and Yield Potential of Forage Crops as Influenced by Irrigation Water Salinity (EC
w
)
and Soil Salinity (EC
e
) – from Ayars and Westcott 1994
Yield Potential
100 %
90 %
75 %
50 %
0 %
(maximum)
Forage Crops
EC
e
EC
w
EC
e
EC
w
EC
e
EC
w
EC
e
EC
w
EC
e
EC
w
Wheatgrass, tall
(Agropyron elongatum)
7.5
5.0
9.9
6.6
13.0
9.0
19.0
13.0
31.0
21.0
Wheatgrass, fairway
crested
(Agropyron cristatum)
7.5
5.0
9.0
6.0
11.0
7.4
15.0
9.8
22.0
15.0
Bermuda grass
(Cynodon dactylon)
6.9
4.6
8.5
5.6
11.0
7.2
15.0
9.8
23.0
15.0
Barley (forage)
(Hordeum vulgare)
6.0
4.0
7.4
4.9
9.5
6.4
13.0
8.7
20.0
13.0
Ryegrass, perennial
(Lolium perenne)
5.6
3.7
6.9
4.6
8.9
5.9
12.0
8.1
19.0
13.0
Trefoil
(Lotus corniculatus
tenuifolium)
5.0
3.3
6.0
4.0
7.5
5.0
10.0
6.7
15.0
10.0
Harding grass
(Phalaris tuberosa)
4.6
3.1
5.9
3.9
7.9
5.3
11.0
7.4
18.0
12.0
Fescue, tall
(Festuca elatior)
3.9
2.6
5.5
3.6
7.8
5.2
12.0
7.8
20.0
13.0
Wheatgrass, standard
crested
(Agropyron sibiricum)
3.5
2.3
6.0
4.0
9.8
6.5
16.0
11.0
28.0
19.0
Vetch, common
(Vicia angustifolia)
3.0
2.0
3.9
2.6
5.3
3.5
7.6
5.0
12.0
8.1
Sudan grass
(Sorghum sudanense)
2.8
1.9
5.1
3.4
8.6
5.7
14.0
9.6
26.0
17.0
Wildrye, beardless
(Elymus triticoides)
2.7
1.8
4.4
2.9
6.9
4.6
11.0
7.4
19.0
13.0
Cowpea (forage)
(Vigna unguiculata)
2.5
1.7
3.4
2.3
4.8
3.2
7.1
4.8
12.0
7.8
Trefoil, big
(Lotus uliginosus )
2.3
1.5
2.8
1.9
3.6
2.4
4.9
3.3
7.6
5.0
Sesbania
(Sesbania exaltata)
2.3
1.5
3.7
2.5
5.9
3.9
9.4
6.3
17.0
11.0
Sphaerophysa
(Sphaerophsa salsula)
2.2
1.5
3.6
2.4
5.8
3.8
9.3
6.2
16.0
11.0
Corn (forage, maize)
(Zea mays)
1.8
1.2
3.2
2.1
5.2
3.5
8.6
5.7
15.0
10.0
Clover, berseem
(Trifolium alexandrinum)
1.5
1.0
3.2
2.2
5.9
3.9
10.0
6.8
19.0
13.0
Orchard grass
(Dactylis glomerata)
1.5
1.0
3.1
2.1
5.5
3.7
9.6
6.4
18.0
12.0
Foxtail, meadow
(Alopecurus pratensis)
1.5
1.0
2.5
1.7
4.1
2.7
6.7
4.5
12.0
7.9
Clover, red
(Trifolium pratense)
1.5
1.0
2.3
1.6
3.6
2.4
5.7
3.8
9.8
6.6
Alfalfa
(Medicago sativa)
2.0
1.3
3.4
2.2
5.4
3.6
8.8
5.9
16.0
10.0
Lovegrass
(Eragrostis sp.)
2.0
1.3
3.2
2.1
5.0
3.3
8.0
5.3
14.0
9.3