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Field Survey Summary Tables – Alberta
26
Table 7. 2009 irrigated annual crops in Alberta (436 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
46.4
11.1
23.9
1.1
2.4
28.0
37.4
2
Wild oats
37.0
8.8
23.8
1.5
4.0
49.2
35.2
3
Redroot pigweed
26.9
6.9
25.7
1.7
6.3
73.4
31.6
4
Kochia
40.8
7.1
17.4
1.0
2.4
89.6
29.6
5
Lamb's-quarters
27.5
6.2
22.4
0.8
2.9
35.8
22.9
6
Canola (Argentine)
16.1
5.5
33.8
0.8
4.7
36.4
18.4
7
Dandelion
23.3
4.7
20.1
0.4
1.7
13.4
16.3
8
Round-leaved mallow
18.6
3.5
18.6
0.3
1.6
28.6
12.5
9
Canada thistle
18.6
2.8
15.0
0.3
1.4
13.2
11.2
10
Alfalfa
8.8
2.4
27.7
0.5
6.2
106.2
10.5
11
Chickweed
3.8
0.9
24.4
0.8
22.0
206.0
9.7
12
Green foxtail
10.0
2.3
22.8
0.3
2.8
28.8
8.3
13
Annual sow-thistle
7.8
1.7
21.8
0.2
2.5
27.2
6.2
14
Quack grass
5.6
1.1
18.8
0.2
3.9
28.4
4.9
15
Stinkweed
7.0
0.9
13.1
0.2
2.6
41.4
4.8
16
Wheat
3.2
1.0
31.9
0.2
6.2
30.0
4.0
17
Shepherd's-purse
5.8
1.0
18.1
0.1
1.8
15.8
3.9
18
Perennial sow-thistle
3.9
0.9
24.5
0.1
3.4
19.6
3.5
19
Smooth brome
1.4
0.6
40.1
0.2
13.6
61.6
2.8
20
Spiny annual sow-thistle
1.6
0.5
33.9
0.1
8.7
57.6
2.3
21
Foxtail barley
3.2
0.4
11.7
0.1
2.8
15.2
2.2
22
Barnyard grass
2.3
0.6
28.3
0.1
3.4
11.8
2.2
23
Field bindweed
3.6
0.6
15.5
< 0.1
1.1
6.0
2.1
24
Pale smartweed
3.6
0.4
9.9
< 0.1
0.9
3.8
1.7
25
Cleavers
2.4
0.5
21.3
< 0.1
1.3
3.6
1.6
26
Barley
1.0
0.4
36.8
0.1
8.5
28.0
1.5
27
Stork's-bill
2.7
0.3
9.7
< 0.1
0.6
1.6
1.2
28
Persian darnel
0.8
0.3
45.0
0.1
6.8
15.2
1.1
29
Prostrate knotweed
1.6
0.3
18.0
< 0.1
1.9
7.6
1.1
30
Russian thistle
2.0
0.2
10.1
< 0.1
0.8
3.4
1.0
31
Prickly lettuce
1.1
0.3
28.7
< 0.1
2.2
5.4
1.0
32
Flixweed
2.5
0.2
6.1
< 0.1
0.3
1.2
1.0
33
Downy brome
1.3
0.2
12.6
< 0.1
0.8
1.6
0.7
34
Wild mustard
0.8
0.2
32.1
< 0.1
2.1
5.6
0.7
35
Wild tomato
1.4
0.1
8.6
< 0.1
0.9
1.4
0.7
36
Narrow-leaved hawk's-beard
1.2
0.1
12.0
< 0.1
0.7
1.6
0.6
37
Hemp-nettle
0.4
0.2
45.0
< 0.1
4.6
4.6
0.5
38
White mustard
0.2
0.1
60.0
< 0.1
9.4
9.4
0.4
39
Sunflower species
0.7
0.1
13.3
< 0.1
1.1
1.6
0.4
40
Broad-leaved plantain
0.5
0.1
13.4
< 0.1
1.2
2.2
0.3
41
Tartary buckwheat
0.5
< 0.1
7.5
< 0.1
1.0
1.4
0.2
42
Cow cockle
0.2
0.1
35.0
< 0.1
1.8
1.8
0.2
43
Corn spurry
0.5
< 0.1
7.5
< 0.1
0.3
0.4
0.2
44
Showy milkweed
0.4
< 0.1
7.5
< 0.1
0.7
0.8
0.2
45
Goat's-beard
0.5
< 0.1
5.0
< 0.1
0.2
0.2
0.2
46
Purslane
0.2
< 0.1
15.0
< 0.1
1.4
1.4
0.1
47
Prostrate pigweed
0.2
< 0.1
15.0
< 0.1
0.6
0.6
0.1
48
Oats
0.3
< 0.1
5.0
< 0.1
0.4
0.4
0.1
49
Common groundsel
0.2
< 0.1
15.0
< 0.1
0.8
0.8
0.1
50
Timothy
0.2
< 0.1
10.0
< 0.1
0.6
0.6
0.1
51
Silky lupin
0.2
< 0.1
20.0
< 0.1
1.0
1.0
0.1
52
Ball mustard
0.3
< 0.1
5.0
< 0.1
0.2
0.2
0.1
(Table continued on next page)