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Field Survey Summary Tables – Alberta
29
Table 9. 2009 irrigated spring wheat in Alberta (155 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
50.8
15.3
30.1
1.8
3.6
28.0
44.7
2
Wild oats
50.3
10.2
20.3
2.0
3.9
49.2
40.1
3
Kochia
44.5
8.2
18.3
1.3
3.0
89.6
31.0
4
Canola (Argentine)
25.2
9.3
37.2
1.6
6.2
36.4
29.5
5
Lamb's-quarters
27.0
5.4
20.0
0.6
2.4
19.8
18.1
6
Dandelion
27.9
5.9
21.2
0.5
1.8
11.0
17.8
7
Redroot pigweed
20.0
3.9
19.5
1.0
4.8
73.4
17.1
8
Canada thistle
26.4
4.5
17.0
0.4
1.4
13.2
14.8
9
Round-leaved mallow
19.2
3.8
19.7
0.4
2.2
28.6
12.5
10
Alfalfa
11.0
3.4
31.0
0.7
6.6
36.8
12.4
11
Green foxtail
13.9
3.1
22.6
0.3
2.0
6.4
9.3
12
Annual sow-thistle
8.9
2.7
30.3
0.4
4.8
27.2
8.7
13
Stinkweed
8.2
1.1
12.9
0.4
5.1
41.4
6.5
14
Spiny annual sow-thistle
3.1
1.2
40.0
0.4
11.9
57.6
5.1
15
Perennial sow-thistle
3.9
1.3
34.3
0.2
5.4
19.6
4.2
16
Foxtail barley
4.9
0.7
15.2
0.2
4.8
15.2
3.9
17
Quack grass
4.4
0.5
12.0
0.1
2.9
22.0
2.7
18
Field bindweed
5.4
0.5
10.1
< 0.1
0.5
1.6
2.2
19
Pale smartweed
4.9
0.5
10.9
< 0.1
0.9
2.0
2.2
20
Shepherd's-purse
4.4
0.5
11.9
< 0.1
1.0
3.0
2.1
21
Chickweed
3.9
0.4
9.8
< 0.1
0.8
2.4
1.7
22
Flixweed
4.3
0.3
6.8
< 0.1
0.4
1.2
1.6
23
Cleavers
2.1
0.6
28.1
< 0.1
1.5
2.4
1.5
24
Narrow-leaved hawk's-beard
2.9
0.3
9.3
< 0.1
0.5
1.2
1.2
25
Smooth brome
1.2
0.4
35.0
< 0.1
2.8
3.2
1.1
26
Russian thistle
2.7
0.2
9.0
< 0.1
0.6
1.2
1.1
27
Stork's-bill
2.4
0.3
11.4
< 0.1
0.6
1.6
1.0
28
Prickly lettuce
1.2
0.4
32.5
< 0.1
2.2
3.6
1.0
29
Broad-leaved plantain
1.5
0.2
13.4
< 0.1
1.2
2.2
0.7
30
Downy brome
1.6
0.2
12.2
< 0.1
0.5
0.6
0.7
31
Prostrate knotweed
1.3
0.2
16.9
< 0.1
0.8
1.2
0.6
32
Wild tomato
1.4
0.1
7.5
< 0.1
0.8
1.2
0.6
33
Cow cockle
0.7
0.2
35.0
< 0.1
1.8
1.8
0.6
34
Goat's-beard
0.9
< 0.1
5.0
< 0.1
0.2
0.2
0.3
35
Wild mustard
0.9
< 0.1
5.0
< 0.1
0.2
0.2
0.3
36
Timothy
0.6
0.1
10.0
< 0.1
0.6
0.6
0.3
37
Barnyard grass
0.6
0.1
10.0
< 0.1
0.4
0.4
0.2
38
Persian darnel
0.7
< 0.1
5.0
< 0.1
0.2
0.2
0.2
39
Showy milkweed
0.6
< 0.1
5.0
< 0.1
0.6
0.6
0.2