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Field Survey Summary Tables – Western Irrigation District
165
Table 201. 2009 irrigated annual crops in Western Irrigation District (10 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
52.1
15.1
29.0
1.5
3.0
8.0
50.0
2
Canola (Argentine)
10.4
10.4 100.0
2.2
20.8
20.8
38.2
3
Wild oats
41.7
8.3
20.0
1.5
3.5
7.0
37.3
4
Lamb's-quarters
31.3
8.3
26.7
0.6
1.9
4.4
25.6
5
Barley
6.1
4.6
75.0
1.7
28.0
28.0
24.8
6
Dandelion
37.4
3.7
10.0
0.2
0.6
1.0
17.8
7
Chickweed
10.4
4.7
45.0
0.9
8.2
8.2
17.6
8
Annual sow-thistle
31.3
4.2
13.3
0.3
0.8
1.0
16.9
9
Kochia
20.9
4.2
20.0
0.3
1.2
2.2
13.9
10
Hemp-nettle
10.4
4.7
45.0
0.5
4.6
4.6
13.9
11
Cleavers
16.6
2.0
11.9
0.2
1.1
2.0
9.1
12
Shepherd's-purse
20.9
1.0
5.0
0.1
0.3
0.4
7.9
13
Canada thistle
10.4
1.6
15.0
0.1
1.0
1.0
6.1
14
Stork's-bill
10.4
1.0
10.0
0.1
1.2
1.2
5.6
15
Quack grass
10.4
0.5
5.0
< 0.1
0.2
0.2
3.9
16
Narrow-leaved hawk's-beard 10.4
0.5
5.0
< 0.1
0.2
0.2
3.9
17
Round-leaved mallow
10.4
0.5
5.0
< 0.1
0.2
0.2
3.9
18
Russian thistle
10.4
0.5
5.0
< 0.1
0.2
0.2
3.9