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Field Survey Summary Tables – Alberta
33
Table 13. 2009 irrigated canola in Alberta (68 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
26.4
5.6
21.3
0.9
3.4
24.2
38.3
2
Wild buckwheat
37.7
6.4
17.1
0.4
0.9
5.0
33.7
3
Kochia
43.9
5.7
13.0
0.3
0.7
3.2
33.3
4
Smooth brome
3.1
2.4
75.0
1.1
34.9
61.6
27.1
5
Lamb's-quarters
20.8
4.8
23.1
0.3
1.6
7.2
23.7
6
Dandelion
17.6
2.9
16.3
0.2
1.1
4.4
15.8
7
Barley
4.7
2.0
43.1
0.5
10.7
28.0
15.5
8
Redroot pigweed
21.3
2.2
10.1
0.1
0.5
1.4
14.2
9
Round-leaved mallow
13.6
2.0
14.5
0.1
0.9
2.4
11.4
10
Green foxtail
6.8
1.9
28.0
0.2
3.6
15.8
11.1
11
Canada thistle
14.1
1.8
12.7
0.1
0.8
4.6
11.0
12
Wheat
5.9
1.7
28.0
0.3
4.5
13.4
10.7
13
Barnyard grass
3.2
1.0
32.2
0.2
5.1
11.8
6.5
14
Annual sow-thistle
8.2
1.1
13.7
0.1
0.7
1.2
6.3
15
Quack grass
7.4
0.8
10.5
0.1
0.9
1.6
5.5
16
Cleavers
5.3
0.8
16.0
0.1
1.1
2.0
4.8
17
Russian thistle
5.5
0.7
12.6
0.1
1.2
3.4
4.6
18
Shepherd's-purse
7.2
0.4
6.1
< 0.1
0.5
1.4
4.2
19
Stinkweed
4.9
0.4
9.1
< 0.1
0.4
0.8
3.1
20
Perennial sow-thistle
3.1
0.5
15.0
< 0.1
0.8
0.8
2.6
21
Downy brome
1.9
0.5
25.0
< 0.1
1.6
1.6
2.2
22
Wild tomato
3.0
0.2
7.5
< 0.1
1.0
1.4
2.1
23
Stork's-bill
2.3
0.2
10.0
< 0.1
1.2
1.2
1.8
24
Spiny annual sow-thistle
1.6
0.3
20.0
< 0.1
1.2
1.2
1.6
25
Foxtail barley
2.7
0.1
5.0
< 0.1
0.6
1.0
1.5
26
Sunflower species
1.4
0.3
20.0
< 0.1
1.6
1.6
1.5
27
Chickweed
1.4
0.3
20.0
< 0.1
1.0
1.0
1.3
28
Alfalfa
1.4
0.3
20.0
< 0.1
0.8
0.8
1.3
29
Corn spurry
1.7
0.1
5.0
< 0.1
0.2
0.2
0.8
30
Ball mustard
1.6
0.1
5.0
< 0.1
0.2
0.2
0.8
31
Japanese brome
1.4
0.1
5.0
< 0.1
0.2
0.2
0.7
32
Flixweed
1.4
0.1
5.0
< 0.1
0.2
0.2
0.7
33
Millet
1.1
0.1
5.0
< 0.1
0.2
0.2
0.5