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Field Survey Summary Tables – Lethbridge County
111
Table 121. 2009 irrigated broad-leaved annual crops in Lethbridge County (22 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wheat
13.7
5.9
42.9
1.0
7.0
13.4
38.5
2
Lamb's-quarters
21.4
7.0
32.5
0.6
2.9
7.2
34.7
3
Redroot pigweed
47.3
5.3
11.2
0.3
0.6
1.4
32.2
4
Wild oats
17.6
6.8
38.9
0.5
3.1
4.8
31.5
5
Wild buckwheat
37.4
4.6
12.3
0.3
0.7
1.6
27.2
6
Kochia
39.0
4.7
12.0
0.2
0.5
1.6
26.9
7
Annual sow-thistle
25.2
5.3
21.1
0.3
1.2
4.8
25.7
8
Canada thistle
23.0
3.5
15.0
0.2
1.0
1.8
19.7
9
Cleavers
9.9
2.7
26.9
0.1
1.3
1.8
11.4
10
Russian thistle
6.1
1.8
30.0
0.2
3.4
3.4
10.3
11
Canola (Argentine)
3.8
1.5
40.0
0.2
4.8
4.8
8.5
12
Dandelion
3.8
1.7
45.0
0.1
2.6
2.6
6.9
13
Shepherd's-purse
6.1
0.6
10.0
0.1
1.4
1.4
5.2
14
Round-leaved mallow
9.9
0.5
5.0
< 0.1
0.2
0.2
4.8
15
Corn spurry
6.1
0.3
5.0
< 0.1
0.2
0.2
2.9
16
Chickweed
3.8
0.6
15.0
< 0.1
0.6
0.6
2.9
17
Quack grass
3.8
0.4
10.0
< 0.1
0.6
0.6
2.6
18
Corn
3.8
0.4
10.0
< 0.1
0.4
0.4
2.4
19
Green foxtail
3.8
0.2
5.0
< 0.1
0.6
0.6
2.2
20
Wild tomato
3.8
0.2
5.0
< 0.1
0.2
0.2
1.8
21
Millet
3.8
0.2
5.0
< 0.1
0.2
0.2
1.8
Table 122. 2009 irrigated canola in Lethbridge County (14 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wheat
8.8
6.6
75.0
1.2
13.4
13.4
46.8
2
Redroot pigweed
51.6
6.5
12.7
0.3
0.7
1.4
42.1
3
Kochia
45.2
5.9
13.1
0.3
0.6
1.6
36.2
4
Lamb's-quarters
8.8
7.0
80.0
0.6
7.2
7.2
33.9
5
Wild oats
14.3
5.4
38.1
0.5
3.2
3.8
28.3
6
Annual sow-thistle
30.9
4.1
13.2
0.2
0.6
1.2
24.8
7
Canada thistle
22.1
4.1
18.8
0.2
1.0
1.6
22.7
8
Wild buckwheat
26.3
2.2
8.3
0.1
0.5
0.6
17.8
9
Russian thistle
8.8
2.6
30.0
0.3
3.4
3.4
16.4
10
Cleavers
8.8
2.2
25.0
0.1
1.0
1.0
10.1
11
Shepherd's-purse
8.8
0.9
10.0
0.1
1.4
1.4
8.3
12
Round-leaved mallow
8.8
0.4
5.0
< 0.1
0.2
0.2
4.8
13
Corn spurry
8.8
0.4
5.0
< 0.1
0.2
0.2
4.8
14
Millet
5.5
0.3
5.0
< 0.1
0.2
0.2
3.0