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Field Survey Summary Tables – Forty Mile County
104
Table 110. 2009 irrigated fields in Forty Mile County (47 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
61.7
8.5
13.8
0.5
0.8
3.4
52.3
2
Wild oats
48.9
8.2
16.7
0.5
0.9
3.4
47.4
3
Lamb's-quarters
42.6
6.3
14.8
0.5
1.2
12.2
42.9
4
Wild buckwheat
46.8
6.6
14.1
0.3
0.7
3.0
39.0
5
Round-leaved mallow
23.4
4.7
20.0
0.2
1.1
2.2
25.1
6
Dandelion
6.4
2.7
41.7
0.5
8.3
22.8
24.6
7
Canada thistle
19.1
2.3
12.2
0.1
0.7
1.2
15.2
8
Redroot pigweed
19.1
2.2
11.7
0.1
0.6
1.6
14.5
9
Stinkweed
14.9
1.2
7.9
0.1
0.3
0.8
8.7
10
Wild tomato
8.5
0.6
7.5
0.1
0.9
1.4
6.4
11
Flixweed
8.5
0.5
6.3
< 0.1
0.3
0.4
4.4
12
Canola (Argentine)
6.4
0.6
10.0
< 0.1
0.5
0.8
4.3
13
Cow cockle
2.1
0.7
35.0
< 0.1
1.8
1.8
3.5
14
Russian thistle
4.3
0.3
7.5
< 0.1
0.3
0.4
2.4
15
Green foxtail
2.1
0.3
15.0
< 0.1
1.2
1.2
2.2
16
Downy brome
2.1
0.3
15.0
< 0.1
0.6
0.6
1.7
17
Prostrate pigweed
2.1
0.3
15.0
< 0.1
0.6
0.6
1.7
18
Foxtail barley
2.1
0.2
10.0
< 0.1
0.4
0.4
1.4
19
Perennial sow-thistle
2.1
0.1
5.0
< 0.1
0.6
0.6
1.3
20
Annual sow-thistle
2.1
0.1
5.0
< 0.1
0.2
0.2
1.0
Table 111. 2009 irrigated annual crops in Forty Mile County (44 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
63.6
9.0
14.1
0.5
0.8
3.4
56.8
2
Wild oats
50.0
8.3
16.6
0.5
0.9
3.4
50.2
3
Lamb's-quarters
43.2
6.4
14.7
0.5
1.2
12.2
46.0
4
Wild buckwheat
50.0
7.0
14.1
0.4
0.7
3.0
43.0
5
Round-leaved mallow
25.0
5.0
20.0
0.3
1.1
2.2
28.0
6
Redroot pigweed
20.5
2.4
11.7
0.1
0.6
1.6
16.0
7
Canada thistle
18.2
2.0
11.3
0.1
0.7
1.2
14.4
8
Stinkweed
15.9
1.3
7.9
0.1
0.3
0.8
9.5
9
Wild tomato
9.1
0.7
7.5
0.1
0.9
1.4
7.2
10
Flixweed
9.1
0.6
6.3
< 0.1
0.3
0.4
4.8
11
Dandelion
4.5
0.8
17.5
< 0.1
1.0
1.8
4.7
12
Cow cockle
2.3
0.8
35.0
< 0.1
1.8
1.8
3.9
13
Russian thistle
4.5
0.3
7.5
< 0.1
0.3
0.4
2.6
14
Canola (Argentine)
4.5
0.3
7.5
< 0.1
0.3
0.4
2.6
15
Green foxtail
2.3
0.3
15.0
< 0.1
1.2
1.2
2.4
16
Downy brome
2.3
0.3
15.0
< 0.1
0.6
0.6
1.9
17
Prostrate pigweed
2.3
0.3
15.0
< 0.1
0.6
0.6
1.9
18
Foxtail barley
2.3
0.2
10.0
< 0.1
0.4
0.4
1.5
19
Perennial sow-thistle
2.3
0.1
5.0
< 0.1
0.6
0.6
1.4
20
Annual sow-thistle
2.3
0.1
5.0
< 0.1
0.2
0.2
1.1