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Field Survey Summary Tables – Eastern Irrigation District
142
Table 166. 2009 irrigated cereal crops in Eastern Irrigation District (48 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
66.7
16.9
25.3
1.3
1.9
11.2
37.1
2
Lamb's-quarters
50.0
14.4
28.8
2.0
3.9
29.4
36.6
3
Alfalfa
29.2
10.7
36.8
2.4
8.3
36.8
32.5
4
Dandelion
54.2
14.1
26.0
1.3
2.3
13.0
32.0
5
Wild oats
43.8
9.4
21.4
1.8
4.0
32.6
29.6
6
Redroot pigweed
33.3
6.6
19.7
1.5
4.5
58.6
23.2
7
Canola (Argentine)
29.2
9.6
32.9
1.2
4.3
32.4
23.1
8
Green foxtail
31.3
7.9
25.3
0.6
1.9
5.6
17.4
9
Kochia
39.6
5.8
14.7
0.3
0.7
2.4
15.1
10
Canada thistle
27.1
5.3
19.6
0.3
1.2
2.4
12.3
11
Shepherd's-purse
14.6
2.3
15.7
0.1
1.0
3.0
6.0
12
Smooth brome
6.3
1.7
26.7
0.1
2.1
3.2
3.7
13
Narrow-leaved hawk's-beard
8.3
1.3
15.0
0.1
0.9
1.6
3.3
14
Quack grass
6.3
0.7
11.7
0.2
3.0
7.4
3.2
15
Annual sow-thistle
6.3
1.5
23.3
0.1
1.5
2.2
3.2
16
Pale smartweed
8.3
0.8
10.0
0.1
1.3
3.8
3.1
17
Spiny annual sow-thistle
6.3
1.4
21.7
0.1
1.5
2.8
3.1
18
Foxtail barley
4.2
1.0
25.0
0.2
4.5
5.6
3.1
19
Round-leaved mallow
6.3
1.0
16.7
0.1
1.7
3.4
2.9
20
Prickly lettuce
4.2
1.4
32.5
0.1
2.2
3.6
2.7
21
Russian thistle
6.3
0.3
5.0
< 0.1
0.3
0.4
1.6
22
Chickweed
4.2
0.3
7.5
< 0.1
0.5
0.8
1.3
23
Barnyard grass
4.2
0.3
7.5
< 0.1
0.3
0.4
1.2
24
Stinkweed
4.2
0.2
5.0
< 0.1
0.2
0.2
1.1
25
Perennial sow-thistle
2.1
0.2
10.0
< 0.1
0.4
0.4
0.7
26
Wheat
2.1
0.1
5.0
< 0.1
0.4
0.4
0.6
27
Cleavers
2.1
0.1
5.0
< 0.1
0.2
0.2
0.5