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Field Survey Summary Tables – St. Mary River Irrigation District
153
Table 182. 2009 irrigated crops in St. Mary River Irrigation District (179 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
26.8
9.5
35.5
2.8
10.4
73.8
39.1
2
Wild buckwheat
43.9
12.4
28.2
1.5
3.3
28.0
39.0
3
Redroot pigweed
23.3
7.4
32.0
2.1
8.8
73.4
30.4
4
Kochia
39.7
6.5
16.3
1.2
2.9
89.6
28.0
5
Wild oats
33.1
7.1
21.3
1.1
3.2
34.6
26.2
6
Lamb's-quarters
28.5
5.9
20.8
1.1
3.7
35.8
23.3
7
Round-leaved mallow
20.2
3.9
19.2
0.4
1.9
28.6
13.7
8
Canada thistle
20.9
3.1
14.7
0.3
1.6
13.2
12.5
9
Green foxtail
7.8
2.1
27.0
0.9
12.0
84.6
11.3
10
Canola (Argentine)
11.6
2.9
24.6
0.4
3.6
36.4
10.0
11
Stinkweed
9.6
1.5
16.1
0.6
6.3
41.4
8.8
12
Annual sow-thistle
8.0
2.4
29.9
0.4
4.9
27.2
8.1
13
Alfalfa
4.4
1.3
29.6
0.5
12.1
106.2
6.6
14
Chickweed
1.7
0.6
35.0
0.6
35.3
139.2
5.4
15
Quack grass
5.1
1.0
20.7
0.2
4.1
22.0
4.3
16
Foxtail barley
4.0
0.6
15.6
0.2
5.3
15.0
3.4
17
Pale smartweed
6.2
0.7
12.1
0.1
1.0
2.0
3.2
18
Field bindweed
5.2
0.7
12.8
0.1
1.4
6.2
2.9
19
Perennial sow-thistle
3.1
0.8
26.7
0.1
4.5
19.6
2.9
20
Spiny annual sow-thistle
1.2
0.5
39.1
0.3
20.8
57.6
2.7
21
Shepherd's-purse
2.9
0.4
14.6
< 0.1
0.9
3.4
1.6
22
Barnyard grass
2.4
0.4
15.9
< 0.1
1.7
6.2
1.5
23
Prostrate knotweed
1.3
0.5
41.7
0.1
4.3
7.6
1.5
24
Flixweed
3.3
0.2
7.1
< 0.1
0.5
1.2
1.4
25
Wheat
2.2
0.3
13.5
< 0.1
2.1
3.2
1.4
26
Wild tomato
3.0
0.2
7.1
< 0.1
0.8
1.4
1.3
27
Downy brome
2.0
0.3
16.1
< 0.1
1.2
1.6
1.2
28
Cleavers
0.9
0.3
40.0
< 0.1
2.7
3.6
0.9
29
Stork's-bill
2.1
0.1
7.1
< 0.1
0.3
0.6
0.9
30
Goat's-beard
1.9
0.2
7.9
< 0.1
0.7
1.8
0.8
31
Wild mustard
1.6
0.1
7.5
< 0.1
0.4
0.6
0.7
32
Broad-leaved plantain
1.6
0.1
5.0
< 0.1
0.4
0.4
0.6
33
Yellow sweet-clover
1.1
0.1
12.5
< 0.1
0.8
1.4
0.6
34
Cow cockle
0.6
0.2
35.0
< 0.1
1.8
1.8
0.6
35
Prickly lettuce
1.2
0.1
8.6
< 0.1
0.3
0.6
0.5
36
Russian thistle
1.3
0.1
7.5
< 0.1
0.3
0.4
0.5
37
Prostrate pigweed
0.6
0.1
15.0
< 0.1
0.6
0.6
0.3
38
Barley
0.6
0.1
15.0
< 0.1
0.6
0.6
0.3
39
White cockle
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.3
40
White clover
0.6
0.1
10.0
< 0.1
0.6
0.6
0.3
41
Timothy
0.6
0.1
10.0
< 0.1
0.6
0.6
0.3
42
Bull thistle
0.6
< 0.1
5.0
< 0.1
0.4
0.4
0.2
43
Corn
0.4
< 0.1
10.0
< 0.1
0.4
0.4
0.2
44
Field dock
0.4
< 0.1
5.0
< 0.1
0.2
0.2
0.2
45
Millet
0.4
< 0.1
5.0
< 0.1
0.2
0.2
0.2