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Field Survey Summary Tables – Lethbridge County
110
Table 119. 2009 irrigated barley in Lethbridge County (47 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
53.7
21.1
39.3
6.3
11.8
73.4
57.2
2
Chickweed
10.6
4.7
44.4
7.3
69.3
206.0
35.6
3
Wild buckwheat
56.8
12.6
22.2
1.5
2.6
17.2
31.0
4
Wild oats
41.3
12.6
30.4
2.3
5.7
34.6
30.7
5
Lamb's-quarters
45.0
10.5
23.3
1.6
3.5
34.8
26.6
6
Kochia
37.5
7.9
21.1
1.3
3.6
33.6
21.5
7
Round-leaved mallow
35.7
5.1
14.3
0.4
1.2
5.0
14.8
8
Canola (Argentine)
19.6
6.0
30.7
0.5
2.8
6.8
12.3
9
Alfalfa
9.0
3.1
33.9
1.7
19.3
106.2
11.8
10
Dandelion
22.7
4.9
21.6
0.4
1.7
7.0
11.4
11
Shepherd's-purse
9.0
3.3
36.2
0.4
4.8
15.8
6.8
12
Canada thistle
13.0
2.3
18.0
0.2
1.7
5.0
6.1
13
Quack grass
5.6
2.4
42.0
0.5
8.2
13.0
5.3
14
Prostrate knotweed
9.0
1.9
21.4
0.2
2.6
7.6
4.8
15
Annual sow-thistle
9.0
2.0
22.1
0.1
1.2
2.2
4.4
16
Perennial sow-thistle
11.5
1.2
10.4
0.1
0.9
2.2
4.2
17
Prickly lettuce
6.5
1.7
26.4
0.1
2.3
5.4
3.7
18
Cleavers
4.0
0.9
22.4
0.1
1.5
3.6
2.0
19
Stinkweed
6.5
0.3
5.0
< 0.1
0.3
0.6
1.9
20
Pale smartweed
5.6
0.4
7.2
< 0.1
0.6
1.0
1.8
21
Stork's-bill
4.7
0.4
8.3
< 0.1
0.3
0.6
1.5
22
Barnyard grass
1.6
0.4
25.0
0.1
6.2
6.2
1.1
23
Wild tomato
2.5
0.4
15.0
< 0.1
1.4
1.4
1.1
24
Field bindweed
2.5
0.2
10.0
< 0.1
0.4
0.4
0.9
25
Corn spurry
2.5
0.2
10.0
< 0.1
0.4
0.4
0.9
26
Flixweed
2.5
0.1
5.0
< 0.1
0.2
0.2
0.7
Table 120. 2009 irrigated corn in Lethbridge County (15 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
78.8
31.9
40.5
7.7
9.8
55.8
91.1
2
Wild buckwheat
70.8
16.7
23.7
1.5
2.2
11.8
38.8
3
Round-leaved mallow
52.5
17.3
32.9
1.5
2.8
11.0
35.0
4
Quack grass
21.2
9.1
42.8
2.5
11.9
28.4
27.6
5
Dandelion
42.4
10.2
24.0
1.2
2.9
13.4
25.4
6
Kochia
29.2
7.7
26.4
0.6
2.2
4.8
16.8
7
Lamb's-quarters
42.4
4.3
10.2
0.4
0.8
2.0
15.0
8
Alfalfa
24.2
4.8
20.0
0.3
1.3
3.6
11.3
9
Annual sow-thistle
23.3
3.1
13.3
0.2
0.7
1.4
8.6
10
Wild oats
13.1
4.2
31.6
0.2
1.6
2.8
7.6
11
Chickweed
16.1
1.6
10.0
0.1
0.4
0.4
5.2
12
Stork's-bill
16.1
1.6
10.0
0.1
0.4
0.6
5.2
13
Canola (Argentine)
13.1
0.9
6.9
< 0.1
0.3
0.4
3.8
14
Field bindweed
8.1
1.6
20.0
0.1
1.2
1.2
3.7
15
Shepherd's-purse
8.1
0.8
10.0
< 0.1
0.4
0.4
2.6
16
Green foxtail
5.1
0.8
15.0
< 0.1
0.8
0.8
2.0