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Field Survey Summary Tables – Bow River Irrigation District
136
Table 157. 2009 irrigated cereal crops in Bow River Irrigation District (48 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
41.7
12.8
30.6
2.7
6.4
49.2
51.5
2
Wild buckwheat
53.3
12.9
24.2
1.1
2.1
12.4
40.6
3
Canola (Argentine)
21.6
9.5
43.9
1.2
5.7
21.4
28.7
4
Kochia
39.7
6.3
15.8
0.4
1.1
5.0
22.4
5
Green foxtail
20.4
5.3
25.8
0.8
4.0
28.8
19.5
6
Wheat
7.0
4.5
65.0
1.1
15.7
30.0
17.5
7
Perennial sow-thistle
9.0
4.6
51.4
0.7
7.9
15.6
14.5
8
Canada thistle
27.3
2.6
9.4
0.1
0.5
1.0
12.0
9
Redroot pigweed
19.3
1.7
9.0
0.2
0.9
3.0
9.1
10
Stinkweed
11.6
2.8
24.0
0.2
1.9
4.6
8.6
11
Round-leaved mallow
14.3
2.3
16.2
0.1
1.0
2.2
8.1
12
Persian darnel
4.6
2.4
52.5
0.4
7.7
15.2
7.5
13
Lamb's-quarters
13.3
1.9
14.4
0.2
1.1
4.8
7.4
14
Dandelion
6.7
2.5
37.2
0.2
3.5
8.4
7.0
15
Shepherd's-purse
4.6
1.7
37.5
0.2
3.8
4.2
5.0
16
Spiny annual sow-thistle
4.3
1.5
34.6
0.2
5.0
6.2
5.0
17
Foxtail barley
11.0
1.0
8.9
0.1
0.7
1.6
4.9
18
Wild mustard
2.3
1.7
75.0
0.1
5.6
5.6
3.9
19
White mustard
2.0
1.2
60.0
0.2
9.4
9.4
3.7
20
Quack grass
4.6
0.9
20.0
0.1
2.4
3.6
3.4
21
Alfalfa
4.3
1.1
26.2
0.1
1.5
2.6
3.2
22
Chickweed
4.6
0.6
12.5
0.1
1.5
2.4
2.6
23
Tartary buckwheat
4.6
0.3
7.5
< 0.1
1.0
1.4
2.1
24
Annual sow-thistle
4.6
0.3
7.5
< 0.1
0.9
1.6
2.1
25
Cleavers
2.3
0.7
30.0
< 0.1
1.8
1.8
1.9
26
Broad-leaved plantain
2.0
0.5
25.0
< 0.1
2.2
2.2
1.6
27
Flixweed
4.3
0.2
5.0
< 0.1
0.2
0.2
1.5
28
Russian thistle
2.3
0.3
15.0
< 0.1
1.2
1.2
1.3
29
Downy brome
2.3
0.1
5.0
< 0.1
0.4
0.4
0.9
30
Smooth brome
2.3
0.1
5.0
< 0.1
0.4
0.4
0.9
31
Barnyard grass
2.3
0.1
5.0
< 0.1
0.4
0.4
0.9
32
Pale smartweed
2.3
0.1
5.0
< 0.1
0.2
0.2
0.8