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Field Survey Summary Tables – Ecodistrict 793
73
Table 63. 2009 irrigated broad-leaved annual crops in the Lethbridge Plain (793) Ecodistrict in the Moist
Mixed Grassland Ecoregion (17 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
55.1
9.4
17.1
0.6
1.1
3.2
35.9
2
Lamb's-quarters
25.6
10.0
39.1
0.8
3.2
7.2
33.6
3
Wild oats
27.5
8.7
31.5
0.7
2.5
4.8
29.9
4
Wheat
12.1
6.0
49.8
1.1
8.8
13.4
29.3
5
Canada thistle
38.0
6.5
17.0
0.4
1.1
4.6
25.1
6
Redroot pigweed
51.8
5.4
10.5
0.3
0.5
1.4
24.1
7
Annual sow-thistle
30.9
6.5
21.1
0.4
1.2
4.8
22.4
8
Wild buckwheat
37.8
4.0
10.7
0.2
0.6
1.6
18.3
9
Dandelion
17.9
4.1
22.9
0.3
1.4
2.6
14.0
10
Round-leaved mallow
29.8
1.5
5.0
0.1
0.2
0.2
10.1
11
Cleavers
12.1
3.3
26.9
0.2
1.3
1.8
9.9
12
Russian thistle
7.4
2.2
30.0
0.3
3.4
3.4
9.1
13
Canola (Argentine)
4.7
1.9
40.0
0.2
4.8
4.8
7.5
14
Quack grass
19.5
1.2
6.2
0.1
0.4
0.6
7.5
15
Stinkweed
14.8
1.6
10.9
0.1
0.6
0.8
7.1
16
Barley
8.8
1.8
20.0
0.1
1.2
1.2
6.2
17
Chickweed
4.7
0.7
15.0
< 0.1
0.6
0.6
2.5
18
Corn spurry
7.4
0.4
5.0
< 0.1
0.2
0.2
2.5
19
Green foxtail
4.7
0.2
5.0
< 0.1
0.6
0.6
1.9
20
Millet
4.7
0.2
5.0
< 0.1
0.2
0.2
1.6
21
Shepherd's-purse
4.4
0.2
5.0
< 0.1
0.2
0.2
1.5
Table 64. 2009 irrigated canola in the Lethbridge Plain (793) Ecodistrict in the Moist Mixed Grassland
Ecoregion (14 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
53.2
10.2
19.1
0.7
1.2
3.2
42.8
2
Wheat
8.6
6.5
75.0
1.2
13.4
13.4
35.4
3
Lamb's-quarters
18.9
9.5
50.2
0.7
3.9
7.2
34.5
4
Canada thistle
44.2
7.5
17.0
0.5
1.1
4.6
33.5
5
Redroot pigweed
43.9
5.2
11.9
0.3
0.6
1.4
25.1
6
Wild oats
21.1
5.7
27.1
0.5
2.3
3.8
24.0
7
Annual sow-thistle
30.5
4.0
13.2
0.2
0.6
1.2
17.8
8
Wild buckwheat
27.6
2.2
8.1
0.1
0.5
0.6
13.3
9
Russian thistle
8.6
2.6
30.0
0.3
3.4
3.4
12.2
10
Round-leaved mallow
29.2
1.5
5.0
0.1
0.2
0.2
11.2
11
Dandelion
15.4
2.3
15.0
0.2
1.0
2.2
10.7
12
Stinkweed
17.3
1.9
10.9
0.1
0.6
0.8
9.4
13
Barley
10.3
2.1
20.0
0.1
1.2
1.2
8.4
14
Cleavers
8.6
2.2
25.0
0.1
1.0
1.0
7.4
15
Quack grass
17.3
0.9
5.0
< 0.1
0.3
0.4
6.9
16
Corn spurry
8.6
0.4
5.0
< 0.1
0.2
0.2
3.3
17
Millet
5.5
0.3
5.0
< 0.1
0.2
0.2
2.1
18
Shepherd's-purse
5.1
0.3
5.0
< 0.1
0.2
0.2
2.0