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Field Survey Summary Tables – Eastern Irrigation District
143
Table 167. 2009 irrigated spring wheat in Eastern Irrigation District (28 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Alfalfa
42.9
17.9
41.7
4.1
9.6
36.8
53.1
2
Dandelion
57.1
15.7
27.5
1.4
2.4
6.0
33.9
3
Wild buckwheat
57.1
15.2
26.6
1.2
2.1
11.2
32.5
4
Canola (Argentine)
35.7
11.6
32.5
1.9
5.2
32.4
30.1
5
Lamb's-quarters
50.0
10.9
21.8
1.2
2.4
15.8
27.6
6
Wild oats
50.0
7.5
15.0
0.8
1.6
5.8
21.7
7
Green foxtail
32.1
9.8
30.6
0.8
2.6
5.6
20.4
8
Canada thistle
32.1
7.0
21.7
0.4
1.3
2.4
15.0
9
Kochia
35.7
5.2
14.5
0.3
0.8
2.4
13.4
10
Redroot pigweed
17.9
2.1
12.0
0.2
1.2
4.8
6.8
11
Foxtail barley
7.1
1.8
25.0
0.3
4.5
5.6
5.2
12
Smooth brome
7.1
2.5
35.0
0.2
2.8
3.2
4.9
13
Round-leaved mallow
10.7
1.8
16.7
0.2
1.7
3.4
4.8
14
Prickly lettuce
7.1
2.3
32.5
0.2
2.2
3.6
4.5
15
Narrow-leaved hawk's-beard 10.7
1.3
11.7
0.1
0.7
1.2
3.6
16
Spiny annual sow-thistle
7.1
1.6
22.5
0.1
1.6
2.8
3.5
17
Shepherd's-purse
10.7
0.9
8.3
0.1
0.7
1.0
3.4
18
Annual sow-thistle
7.1
1.6
22.5
0.1
1.1
1.4
3.3
19
Quack grass
7.1
0.7
10.0
0.1
0.8
1.4
2.4
20
Chickweed
7.1
0.5
7.5
< 0.1
0.5
0.8
2.1
21
Pale smartweed
7.1
0.5
7.5
< 0.1
0.5
0.6
2.1
22
Russian thistle
7.1
0.4
5.0
< 0.1
0.3
0.4
1.8
23
Barnyard grass
3.6
0.4
10.0
< 0.1
0.4
0.4
1.1
24
Perennial sow-thistle
3.6
0.4
10.0
< 0.1
0.4
0.4
1.1
25
Cleavers
3.6
0.2
5.0
< 0.1
0.2
0.2
0.9
26
Stinkweed
3.6
0.2
5.0
< 0.1
0.2
0.2
0.9
Table 168. 2009 irrigated barley in Eastern Irrigation District (13 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
53.8
18.5
34.3
4.8
8.9
32.6
54.7
2
Wild buckwheat
92.3
25.8
27.9
1.8
2.0
5.2
52.8
3
Redroot pigweed
53.8
13.8
25.7
4.8
8.9
58.6
50.6
4
Lamb's-quarters
46.2
20.8
45.0
4.0
8.6
29.4
50.5
5
Kochia
53.8
8.1
15.0
0.4
0.7
1.4
20.6
6
Dandelion
46.2
6.5
14.2
0.4
0.8
1.8
17.7
7
Green foxtail
38.5
7.7
20.0
0.4
1.0
1.6
17.3
8
Shepherd's-purse
15.4
4.2
27.5
0.3
1.8
3.0
8.6
9
Canada thistle
23.1
2.3
10.0
0.1
0.6
1.4
7.7
10
Pale smartweed
15.4
1.9
12.5
0.3
2.0
3.8
6.7
11
Quack grass
7.7
1.2
15.0
0.6
7.4
7.4
5.9
12
Alfalfa
7.7
0.8
10.0
< 0.1
0.6
0.6
2.6
13
Wheat
7.7
0.4
5.0
< 0.1
0.4
0.4
2.2
14
Russian thistle
7.7
0.4
5.0
< 0.1
0.2
0.2
2.1