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Field Survey Summary Tables – Alberta
31
Table 11. 2009 irrigated corn in Alberta (39 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
56.9
16.5
29.0
3.2
5.7
55.8
57.3
2
Wild buckwheat
64.7
15.8
24.5
1.3
2.0
11.8
41.8
3
Round-leaved mallow
36.8
9.9
27.0
0.7
2.0
11.0
24.7
4
Dandelion
38.2
8.1
21.1
0.8
2.1
13.4
23.7
5
Lamb's-quarters
39.4
6.4
16.3
0.7
1.7
12.2
21.2
6
Canola (Argentine)
31.0
8.4
27.2
0.6
1.9
6.0
20.6
7
Wheat
10.8
5.6
51.6
1.3
12.3
30.0
19.5
8
Kochia
38.9
5.4
13.8
0.4
1.0
4.8
17.5
9
Quack grass
10.6
3.6
34.2
1.0
9.1
28.4
14.3
10
Alfalfa
18.9
4.2
22.3
0.4
1.9
9.0
11.7
11
Green foxtail
11.2
2.4
21.7
0.5
4.1
13.0
9.0
12
Wild oats
10.0
3.6
36.1
0.3
2.5
7.0
8.0
13
Shepherd's-purse
8.6
2.4
28.0
0.2
2.6
4.2
6.3
14
Canada thistle
12.5
1.4
10.9
0.1
0.5
1.0
4.8
15
Field bindweed
8.9
1.4
15.3
0.1
0.9
1.2
4.1
16
Annual sow-thistle
8.6
1.1
13.3
0.1
0.7
1.4
3.6
17
Chickweed
5.9
0.6
10.0
< 0.1
0.4
0.4
2.1
18
Stork's-bill
5.9
0.6
10.0
< 0.1
0.4
0.6
2.1
19
Stinkweed
5.2
0.3
5.0
< 0.1
0.2
0.2
1.5
20
Oats
3.5
0.2
5.0
< 0.1
0.4
0.4
1.1
21
Barley
2.4
0.4
15.0
< 0.1
0.6
0.6
1.0
22
Downy brome
2.8
0.1
5.0
< 0.1
0.4
0.4
0.9
23
Foxtail barley
2.8
0.1
5.0
< 0.1
0.2
0.2
0.8
24
Flixweed
2.8
0.1
5.0
< 0.1
0.2
0.2
0.8
25
Pale smartweed
2.8
0.1
5.0
< 0.1
0.2
0.2
0.8
26
Barnyard grass
2.4
0.1
5.0
< 0.1
0.2
0.2
0.7