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Field Survey Summary Tables – Bow River Irrigation District
134
Table 155. 2009 irrigated fields in Bow River Irrigation District (101 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
27.9
8.4
30.2
1.7
6.2
49.2
45.7
2
Dandelion
17.7
7.1
40.0
1.0
5.9
20.8
31.1
3
Wild buckwheat
28.3
6.3
22.2
0.5
1.9
12.4
27.9
4
Canola (Argentine)
17.0
5.3
31.1
0.6
3.6
21.4
22.7
5
Kochia
26.0
3.8
14.4
0.4
1.4
13.6
20.7
6
Green foxtail
11.7
3.2
26.9
0.4
3.7
28.8
15.1
7
Canada thistle
19.2
2.8
14.6
0.2
1.1
9.0
14.6
8
Smooth brome
3.3
1.7
51.7
0.8
23.4
61.6
13.5
9
Perennial sow-thistle
8.5
3.0
34.6
0.4
4.4
15.6
12.7
10
Wheat
5.5
2.4
44.0
0.5
9.8
30.0
12.7
11
Redroot pigweed
12.0
2.0
16.3
0.2
1.6
9.0
10.3
12
Lamb's-quarters
12.2
2.2
18.5
0.1
1.2
4.8
10.2
13
Foxtail barley
10.3
1.1
10.9
0.1
0.8
1.8
6.8
14
Persian darnel
3.3
1.5
45.0
0.2
6.8
15.2
6.5
15
Quack grass
7.9
1.1
13.4
0.1
1.7
3.6
6.4
16
Stinkweed
6.5
1.4
21.2
0.1
1.6
4.6
6.1
17
Round-leaved mallow
6.8
1.1
16.2
0.1
1.0
2.2
5.3
18
Spiny annual sow-thistle
3.2
0.9
29.5
0.1
3.7
6.2
4.2
19
Shepherd's-purse
2.2
0.8
37.5
0.1
3.8
4.2
3.2
20
Tartary buckwheat
3.3
0.6
16.7
< 0.1
1.4
2.2
2.8
21
Alfalfa
3.0
0.7
22.7
< 0.1
1.2
2.6
2.7
22
Wild mustard
1.1
0.8
75.0
0.1
5.6
5.6
2.5
23
White mustard
1.0
0.6
60.0
0.1
9.4
9.4
2.4
24
Barnyard grass
2.1
0.5
25.8
< 0.1
1.7
3.2
2.1
25
Flixweed
4.0
0.2
5.0
< 0.1
0.2
0.2
2.0
26
Chickweed
2.2
0.3
12.5
< 0.1
1.5
2.4
1.7
27
Annual sow-thistle
2.2
0.2
7.5
< 0.1
0.9
1.6
1.4
28
Cleavers
1.1
0.3
30.0
< 0.1
1.8
1.8
1.2
29
Broad-leaved plantain
1.0
0.2
25.0
< 0.1
2.2
2.2
1.0
30
Russian thistle
1.1
0.2
15.0
< 0.1
1.2
1.2
0.9
31
Purslane
1.0
0.1
15.0
< 0.1
1.4
1.4
0.8
32
Common groundsel
1.0
0.1
15.0
< 0.1
0.8
0.8
0.7
33
Downy brome
1.1
0.1
5.0
< 0.1
0.4
0.4
0.6
34
Rough cinquefoil
1.1
0.1
5.0
< 0.1
0.2
0.2
0.5
35
Ball mustard
1.1
0.1
5.0
< 0.1
0.2
0.2
0.5
36
Pale smartweed
1.1
0.1
5.0
< 0.1
0.2
0.2
0.5