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Field Survey Summary Tables – Eastern Irrigation District
141
Table 165. 2009 irrigated annual crops in Eastern Irrigation District (69 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
69.6
16.0
23.0
1.1
1.6
11.2
38.2
2
Lamb's-quarters
47.8
12.0
25.2
1.5
3.1
29.4
33.5
3
Wild oats
47.8
9.6
20.0
1.5
3.2
32.6
31.4
4
Dandelion
49.3
11.5
23.4
1.0
2.0
13.0
28.9
5
Alfalfa
24.6
8.6
34.7
1.7
7.0
36.8
27.5
6
Redroot pigweed
39.1
7.7
19.6
1.4
3.5
58.6
26.6
7
Green foxtail
30.4
8.4
27.6
0.8
2.5
15.8
20.5
8
Canola (Argentine)
20.3
6.7
32.9
0.9
4.3
32.4
17.6
9
Kochia
43.5
5.9
13.5
0.3
0.6
2.4
16.7
10
Canada thistle
23.2
4.0
17.2
0.2
1.0
2.4
10.4
11
Barnyard grass
8.7
3.0
35.0
0.4
4.4
11.8
7.8
12
Quack grass
8.7
1.2
13.3
0.2
2.2
7.4
4.4
13
Shepherd's-purse
10.1
1.6
15.7
0.1
1.0
3.0
4.4
14
Round-leaved mallow
5.8
1.4
25.0
0.1
2.5
5.0
3.7
15
Pale smartweed
7.2
0.7
10.0
0.1
1.1
3.8
2.8
16
Foxtail barley
4.3
0.8
18.3
0.1
3.1
5.6
2.7
17
Smooth brome
4.3
1.2
26.7
0.1
2.1
3.2
2.7
18
Wheat
5.8
0.7
12.5
0.1
1.4
2.0
2.5
19
Narrow-leaved hawk's-beard
5.8
0.9
15.0
0.1
0.9
1.6
2.4
20
Annual sow-thistle
4.3
1.0
23.3
0.1
1.5
2.2
2.4
21
Spiny annual sow-thistle
4.3
0.9
21.7
0.1
1.5
2.8
2.3
22
Prickly lettuce
2.9
0.9
32.5
0.1
2.2
3.6
2.0
23
Barley
1.4
0.7
45.0
0.1
7.4
7.4
1.8
24
Chickweed
4.3
0.5
11.7
< 0.1
0.7
1.0
1.6
25
Russian thistle
4.3
0.2
5.0
< 0.1
0.3
0.4
1.2
26
Stinkweed
4.3
0.2
5.0
< 0.1
0.2
0.2
1.2
27
Cleavers
2.9
0.2
7.5
< 0.1
0.3
0.4
0.9
28
Stork's-bill
1.4
0.1
10.0
< 0.1
0.6
0.6
0.5
29
Perennial sow-thistle
1.4
0.1
10.0
< 0.1
0.4
0.4
0.5
30
Japanese brome
1.4
0.1
5.0
< 0.1
0.2
0.2
0.4
31
Flixweed
1.4
0.1
5.0
< 0.1
0.2
0.2
0.4