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Field Survey Summary Tables – Alberta
28
Table 8. 2009 irrigated cereal crops in Alberta (303 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
53.0
13.9
26.2
1.5
2.8
28.0
38.4
2
Wild oats
43.6
10.6
24.3
1.9
4.3
49.2
35.3
3
Redroot pigweed
30.4
8.7
28.7
2.3
7.7
73.4
33.1
4
Kochia
43.0
8.3
19.4
1.3
3.0
89.6
28.6
5
Lamb's-quarters
31.4
7.2
22.9
1.0
3.3
35.8
22.8
6
Canola (Argentine)
21.0
7.5
35.7
1.1
5.1
36.4
20.7
7
Dandelion
27.8
5.9
21.0
0.5
1.9
13.4
16.9
8
Round-leaved mallow
21.7
4.1
19.0
0.4
1.8
28.6
12.5
9
Alfalfa
11.4
3.2
28.3
0.8
6.7
106.2
11.6
10
Canada thistle
21.7
3.4
15.7
0.3
1.5
13.2
11.3
11
Chickweed
4.9
1.2
25.2
1.2
24.4
206.0
10.8
12
Green foxtail
12.0
2.6
22.0
0.3
2.7
28.8
8.0
13
Annual sow-thistle
9.1
2.0
22.4
0.3
2.9
27.2
6.2
14
Stinkweed
8.3
1.2
14.2
0.3
3.1
41.4
5.1
15
Quack grass
5.8
1.3
22.4
0.3
5.2
28.4
4.9
16
Shepherd's-purse
6.6
1.4
21.1
0.1
2.1
15.8
4.1
17
Perennial sow-thistle
4.8
1.2
25.9
0.2
3.8
19.6
3.8
18
Spiny annual sow-thistle
1.9
0.7
36.6
0.2
10.1
57.6
2.5
19
Wheat
1.7
0.7
43.1
0.2
10.1
30.0
2.4
20
Field bindweed
4.8
0.7
15.6
0.1
1.1
6.0
2.4
21
Foxtail barley
3.2
0.4
14.0
0.1
3.9
15.2
2.1
22
Pale smartweed
4.8
0.5
9.9
< 0.1
0.9
3.8
2.0
23
Prostrate knotweed
2.3
0.4
18.0
< 0.1
1.9
7.6
1.3
24
Prickly lettuce
1.6
0.5
28.7
< 0.1
2.2
5.4
1.2
25
Stork's-bill
3.0
0.3
9.6
< 0.1
0.5
1.6
1.2
26
Cleavers
1.7
0.4
26.0
< 0.1
1.5
3.6
1.1
27
Flixweed
2.9
0.2
6.4
< 0.1
0.4
1.2
1.0
28
Persian darnel
0.7
0.4
52.5
0.1
7.7
15.2
1.0
29
Wild mustard
1.1
0.4
32.1
< 0.1
2.1
5.6
0.8
30
Smooth brome
1.3
0.3
20.6
< 0.1
1.7
3.2
0.8
31
Narrow-leaved hawk's-beard
1.8
0.2
12.0
< 0.1
0.7
1.6
0.8
32
Russian thistle
1.7
0.1
8.3
< 0.1
0.5
1.2
0.6
33
Barnyard grass
1.2
0.1
10.2
< 0.1
1.5
6.2
0.6
34
Hemp-nettle
0.5
0.2
45.0
< 0.1
4.6
4.6
0.6
35
White mustard
0.3
0.2
60.0
< 0.1
9.4
9.4
0.5
36
Wild tomato
1.1
0.1
10.1
< 0.1
1.0
1.4
0.5
37
Downy brome
1.2
0.1
10.0
< 0.1
0.5
0.6
0.5
38
Broad-leaved plantain
0.8
0.1
13.4
< 0.1
1.2
2.2
0.4
39
Tartary buckwheat
0.7
0.1
7.5
< 0.1
1.0
1.4
0.3
40
Cow cockle
0.4
0.1
35.0
< 0.1
1.8
1.8
0.3
41
Oats
0.5
< 0.1
5.0
< 0.1
0.4
0.4
0.2
42
Corn spurry
0.4
< 0.1
10.0
< 0.1
0.4
0.4
0.1
43
Barley
0.3
< 0.1
15.0
< 0.1
0.6
0.6
0.1
44
Goat's-beard
0.4
< 0.1
5.0
< 0.1
0.2
0.2
0.1
45
Sunflower species
0.3
< 0.1
10.0
< 0.1
0.8
0.8
0.1
46
Timothy
0.3
< 0.1
10.0
< 0.1
0.6
0.6
0.1
47
Silky lupin
0.2
< 0.1
20.0
< 0.1
1.0
1.0
0.1
48
Showy milkweed
0.3
< 0.1
5.0
< 0.1
0.6
0.6
0.1
49
Wormseed mustard
0.3
< 0.1
5.0
< 0.1
0.2
0.2
0.1