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Field Survey Summary Tables – Vulcan County
128
Table 147. 2009 irrigated annual crops in Vulcan County (17 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
47.1
21.5
45.6
6.1
12.9
49.2
46.3
2
Wild buckwheat
64.7
16.5
25.5
1.5
2.3
7.8
28.0
3
Smooth brome
17.6
9.1
51.7
4.1
23.4
61.6
25.4
4
Wheat
29.4
12.9
44.0
2.9
9.8
30.0
24.9
5
Canola (Argentine)
29.4
16.2
55.0
1.9
6.5
15.4
23.2
6
Perennial sow-thistle
29.4
12.9
44.0
1.9
6.3
15.6
20.9
7
Kochia
41.2
8.2
20.0
1.3
3.3
13.6
17.9
8
Persian darnel
17.6
7.9
45.0
1.2
6.8
15.2
13.0
9
Stinkweed
29.4
7.1
24.0
0.6
1.9
4.6
12.0
10
Dandelion
23.5
7.6
32.5
0.7
3.0
8.4
11.9
11
Canada thistle
29.4
3.2
11.0
0.2
0.6
1.0
8.0
12
Lamb's-quarters
23.5
3.8
16.3
0.3
1.4
4.8
7.9
13
Redroot pigweed
23.5
2.4
10.0
0.3
1.3
3.0
6.9
14
Shepherd's-purse
11.8
4.4
37.5
0.4
3.8
4.2
6.7
15
Foxtail barley
23.5
1.8
7.5
0.1
0.5
1.2
5.7
16
Spiny annual sow-thistle
11.8
2.9
25.0
0.4
3.7
6.2
5.7
17
Wild mustard
5.9
4.4
75.0
0.3
5.6
5.6
5.2
18
Quack grass
11.8
2.4
20.0
0.3
2.4
3.6
4.7
19
Chickweed
11.8
1.5
12.5
0.2
1.5
2.4
3.7
20
Tartary buckwheat
11.8
0.9
7.5
0.1
1.0
1.4
3.1
21
Annual sow-thistle
11.8
0.9
7.5
0.1
0.9
1.6
3.1
22
Cleavers
5.9
1.8
30.0
0.1
1.8
1.8
2.6
23
Russian thistle
5.9
0.9
15.0
0.1
1.2
1.2
1.9
24
Green foxtail
5.9
0.9
15.0
< 0.1
0.6
0.6
1.8
25
Alfalfa
5.9
0.6
10.0
< 0.1
0.6
0.6
1.6
26
Downy brome
5.9
0.3
5.0
< 0.1
0.4
0.4
1.3
27
Barnyard grass
5.9
0.3
5.0
< 0.1
0.4
0.4
1.3
28
Flixweed
5.9
0.3
5.0
< 0.1
0.2
0.2
1.3
29
Round-leaved mallow
5.9
0.3
5.0
< 0.1
0.2
0.2
1.3
30
Ball mustard
5.9
0.3
5.0
< 0.1
0.2
0.2
1.3
31
Pale smartweed
5.9
0.3
5.0
< 0.1
0.2
0.2
1.3