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Field Survey Summary Tables – Eastern Irrigation District
140
Table 164. 2009 irrigated fields in Eastern Irrigation District (121 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
68.6
32.9
48.0
5.8
8.4
51.6
90.9
2
Lamb's-quarters
34.7
8.6
24.9
1.2
3.5
31.2
25.7
3
Wild buckwheat
43.0
9.9
23.0
0.7
1.6
11.2
25.2
4
Wild oats
31.4
5.9
18.8
0.9
2.9
32.6
20.1
5
Kochia
32.2
4.8
14.7
0.5
1.6
31.4
16.3
6
Redroot pigweed
24.0
4.5
18.8
0.8
3.3
58.6
16.1
7
Alfalfa
14.0
4.9
34.7
1.0
7.0
36.8
15.4
8
Canada thistle
28.1
4.9
17.4
0.3
1.2
9.4
14.2
9
Green foxtail
18.2
5.0
27.7
0.5
2.6
15.8
12.9
10
Canola (Argentine)
11.6
3.8
32.9
0.5
4.3
32.4
10.2
11
Smooth brome
11.6
3.1
27.1
0.5
4.0
30.6
9.3
12
Barnyard grass
7.4
2.4
32.2
0.3
3.9
11.8
6.3
13
Quack grass
9.1
1.5
16.4
0.3
3.0
13.0
5.7
14
Shepherd's-purse
8.3
1.1
13.5
0.1
0.8
3.0
3.7
15
Narrow-leaved hawk's-beard
5.8
1.2
20.0
0.1
1.1
2.2
3.1
16
Foxtail barley
5.8
0.7
12.9
0.1
1.6
5.6
2.9
17
Spiny annual sow-thistle
5.0
0.9
17.5
0.1
1.2
2.8
2.5
18
Round-leaved mallow
4.1
0.9
21.0
0.1
2.0
5.0
2.5
19
Annual sow-thistle
4.1
0.9
21.0
0.1
1.4
2.4
2.3
20
Perennial sow-thistle
3.3
0.9
27.5
0.1
2.5
7.6
2.3
21
Pale smartweed
4.1
0.4
10.0
< 0.1
1.1
3.8
1.8
22
Russian thistle
5.0
0.2
5.0
< 0.1
0.2
0.4
1.6
23
Wheat
3.3
0.4
12.5
< 0.1
1.4
2.0
1.6
24
Prickly lettuce
1.7
0.5
32.5
< 0.1
2.2
3.6
1.2
25
Chickweed
2.5
0.3
11.7
< 0.1
0.7
1.0
1.0
26
Barley
0.8
0.4
45.0
0.1
7.4
7.4
1.0
27
Stinkweed
2.5
0.1
5.0
< 0.1
0.2
0.2
0.8
28
Cleavers
1.7
0.1
7.5
< 0.1
0.3
0.4
0.6
29
Curled dock
1.7
0.1
7.5
< 0.1
0.3
0.4
0.6
30
White sweet-clover
0.8
0.1
15.0
< 0.1
2.0
2.0
0.4
31
Common burdock
0.8
0.1
10.0
< 0.1
1.4
1.4
0.4
32
Stork's-bill
0.8
0.1
10.0
< 0.1
0.6
0.6
0.3
33
Silver sagebrush
0.8
0.1
10.0
< 0.1
0.4
0.4
0.3
34
Showy milkweed
0.8
< 0.1
5.0
< 0.1
0.4
0.4
0.3
35
Japanese brome
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.3
36
Flixweed
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.3
37
Broad-leaved plantain
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.3