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Field Survey Summary Tables – Alberta
32
Table 12. 2009 irrigated broad-leaved annual crops in Alberta (133 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
22.0
4.8
21.7
0.6
2.7
24.2
35.8
2
Kochia
35.8
4.2
11.8
0.3
0.9
13.6
33.5
3
Wild buckwheat
31.3
4.7
15.0
0.2
0.8
5.0
30.8
4
Lamb's-quarters
18.5
3.7
20.3
0.3
1.4
7.2
23.3
5
Redroot pigweed
18.8
2.7
14.6
0.2
1.2
13.4
20.1
6
Smooth brome
1.7
1.3
75.0
0.6
34.9
61.6
18.2
7
Dandelion
13.0
2.0
15.5
0.1
1.0
4.4
13.4
8
Wheat
6.6
1.6
25.1
0.3
3.8
13.4
13.0
9
Round-leaved mallow
11.6
2.0
16.8
0.1
1.1
5.0
12.9
10
Barnyard grass
4.6
1.8
39.4
0.2
4.6
11.8
11.6
11
Canada thistle
11.6
1.4
11.8
0.1
1.2
7.0
11.6
12
Green foxtail
5.6
1.5
26.9
0.2
3.2
15.8
10.6
13
Barley
2.5
1.1
43.1
0.3
10.7
28.0
10.3
14
Annual sow-thistle
4.9
1.0
19.6
0.1
1.2
4.8
5.8
15
Canola (Argentine)
4.9
0.8
15.7
0.1
1.0
4.8
5.2
16
Cleavers
4.1
0.7
16.8
< 0.1
1.1
2.0
4.5
17
Quack grass
5.2
0.5
9.7
< 0.1
0.7
1.6
4.4
18
Alfalfa
2.9
0.6
22.5
< 0.1
1.2
2.4
3.6
19
Russian thistle
2.9
0.4
12.6
< 0.1
1.2
3.4
3.0
20
Stinkweed
4.0
0.3
7.6
< 0.1
0.4
0.8
2.8
21
Shepherd's-purse
3.9
0.2
6.1
< 0.1
0.5
1.4
2.7
22
Foxtail barley
3.1
0.2
6.3
< 0.1
0.4
1.0
2.1
23
Downy brome
1.7
0.3
16.6
< 0.1
1.4
1.6
2.0
24
Persian darnel
0.8
0.3
30.0
< 0.1
5.0
5.0
2.0
25
Stork's-bill
1.9
0.2
10.0
< 0.1
1.0
1.2
1.8
26
Wild tomato
2.2
0.2
6.9
< 0.1
0.8
1.4
1.7
27
Perennial sow-thistle
1.7
0.3
15.0
< 0.1
0.8
0.8
1.6
28
Sunflower species
1.4
0.2
15.0
< 0.1
1.3
1.6
1.6
29
Chickweed
1.3
0.2
17.8
< 0.1
0.8
1.0
1.4
30
Spiny annual sow-thistle
0.8
0.2
20.0
< 0.1
1.2
1.2
1.0
31
Field bindweed
0.7
0.1
15.0
< 0.1
1.6
1.6
0.9
32
Flixweed
1.4
0.1
5.0
< 0.1
0.2
0.2
0.8
33
Purslane
0.7
0.1
15.0
< 0.1
1.4
1.4
0.8
34
Prostrate pigweed
0.8
0.1
15.0
< 0.1
0.6
0.6
0.8
35
Common groundsel
0.7
0.1
15.0
< 0.1
0.8
0.8
0.7
36
Showy milkweed
0.7
0.1
10.0
< 0.1
0.8
0.8
0.6
37
Pale smartweed
0.7
0.1
10.0
< 0.1
0.4
0.4
0.5
38
Corn spurry
0.9
< 0.1
5.0
< 0.1
0.2
0.2
0.5
39
Ball mustard
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.5
40
Corn
0.6
0.1
10.0
< 0.1
0.4
0.4
0.4
41
Japanese brome
0.7
< 0.1
5.0
< 0.1
0.2
0.2
0.4
42
Goat's-beard
0.7
< 0.1
5.0
< 0.1
0.2
0.2
0.4
43
Millet
0.6
< 0.1
5.0
< 0.1
0.2
0.2
0.3