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Field Survey Summary Tables – Forty Mile County
106
Table 114. 2009 irrigated broad-leaved annual crops in Forty Mile County (18 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
55.6
6.9
12.5
0.3
0.6
1.0
75.6
2
Wild buckwheat
50.0
6.7
13.3
0.3
0.6
1.0
69.4
3
Round-leaved mallow
33.3
6.9
20.8
0.4
1.1
1.8
69.0
4
Wild oats
16.7
2.5
15.0
0.1
0.7
1.2
26.4
5
Lamb's-quarters
16.7
1.7
10.0
0.1
0.4
0.6
19.2
6
Wild tomato
11.1
0.8
7.5
0.1
1.0
1.4
16.8
7
Prostrate pigweed
5.6
0.8
15.0
< 0.1
0.6
0.6
8.2
8
Foxtail barley
5.6
0.6
10.0
< 0.1
0.4
0.4
6.4
9
Stinkweed
5.6
0.3
5.0
< 0.1
0.2
0.2
4.5
10
Russian thistle
5.6
0.3
5.0
< 0.1
0.2
0.2
4.5
Table 115. 2009 irrigated crops in Lethbridge County (141 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
44.5
15.2
34.2
4.1
9.3
73.4
49.4
2
Wild buckwheat
53.3
14.0
26.3
1.8
3.3
28.0
37.8
3
Wild oats
31.6
9.4
29.8
1.7
5.3
47.0
26.9
4
Dandelion
31.6
8.4
26.5
1.3
4.1
45.4
23.7
5
Kochia
34.3
6.9
20.1
1.2
3.4
89.6
22.4
6
Lamb's-quarters
31.2
7.1
22.9
0.9
2.9
34.8
20.4
7
Canola (Argentine)
20.3
7.1
35.1
1.0
5.1
36.4
18.1
8
Chickweed
7.4
2.0
27.4
2.6
34.9
206.0
18.0
9
Round-leaved mallow
29.1
6.2
21.5
0.7
2.3
28.6
17.6
10
Annual sow-thistle
14.4
4.1
28.8
0.5
3.7
27.2
10.9
11
Canada thistle
16.5
3.3
20.2
0.3
2.1
13.2
9.5
12
Alfalfa
9.2
1.8
19.5
0.7
7.1
106.2
7.8
13
Quack grass
7.0
2.3
32.1
0.6
8.2
28.4
7.2
14
Shepherd's-purse
6.9
1.8
26.3
0.2
3.1
15.8
4.8
15
Perennial sow-thistle
5.5
1.0
18.9
0.2
2.8
19.6
3.3
16
Prostrate knotweed
5.1
1.2
22.7
0.1
2.3
7.6
3.2
17
Cleavers
3.7
1.1
29.4
0.1
1.6
3.6
2.4
18
Spiny annual sow-thistle
0.6
0.6 100.0
0.3
57.6
57.6
2.4
19
Pale smartweed
4.7
0.6
13.5
< 0.1
1.0
2.0
2.1
20
Wheat
2.0
0.8
42.9
0.1
7.0
13.4
2.1
21
Stork's-bill
5.1
0.6
11.2
< 0.1
0.5
1.6
2.1
22
Prickly lettuce
2.3
0.6
26.4
0.1
2.3
5.4
1.5
23
Field bindweed
2.3
0.4
18.6
< 0.1
1.0
1.6
1.2
24
Russian thistle
1.7
0.3
17.5
< 0.1
1.8
3.4
0.9
25
Green foxtail
2.0
0.2
10.0
< 0.1
0.8
1.0
0.8
26
Stinkweed
2.3
0.1
5.0
< 0.1
0.3
0.6
0.8
27
Barnyard grass
1.1
0.2
17.5
< 0.1
3.4
6.2
0.7
28
Corn spurry
1.7
0.1
7.5
< 0.1
0.3
0.4
0.6
29
Wild tomato
1.4
0.2
11.1
< 0.1
0.9
1.4
0.6
30
Flixweed
0.9
< 0.1
5.0
< 0.1
0.2
0.2
0.3
31
Corn
0.6
0.1
10.0
< 0.1
0.4
0.4
0.2
32
Field dock
0.6
< 0.1
5.0
< 0.1
0.2
0.2
0.2
33
Millet
0.6
< 0.1
5.0
< 0.1
0.2
0.2
0.2