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Field Survey Summary Tables – Ecodistrict 793
72
Table 61. 2009 irrigated barley in the Lethbridge Plain (793) Ecodistrict in the Moist Mixed Grassland
Ecoregion (52 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
50.5
19.5
38.6
5.8
11.6
73.4
52.4
2
Wild oats
44.7
13.7
30.8
2.4
5.4
34.6
32.5
3
Chickweed
7.4
4.2
56.5
6.7
90.5
206.0
31.8
4
Wild buckwheat
54.7
12.8
23.3
1.5
2.8
17.2
30.3
5
Lamb's-quarters
42.5
10.8
25.5
1.5
3.6
34.8
25.8
6
Kochia
40.2
8.9
22.1
2.1
5.3
44.0
25.8
7
Canola (Argentine)
19.3
8.1
42.1
1.0
5.4
19.8
16.0
8
Round-leaved mallow
34.0
4.7
13.9
0.4
1.1
5.0
13.7
9
Dandelion
27.1
5.2
19.0
0.4
1.5
7.0
12.5
10
Alfalfa
11.9
3.1
25.8
1.6
13.7
106.2
12.0
11
Shepherd's-purse
10.1
3.2
31.4
0.4
4.0
15.8
6.8
12
Quack grass
7.0
2.2
32.2
0.4
6.1
13.0
5.3
13
Canada thistle
12.3
1.6
13.0
0.2
1.3
5.0
4.9
14
Prostrate knotweed
10.1
1.9
18.4
0.2
2.2
7.6
4.9
15
Annual sow-thistle
9.6
2.1
22.5
0.2
1.6
4.2
4.8
16
Perennial sow-thistle
10.5
1.1
10.4
0.1
0.9
2.2
3.8
17
Prickly lettuce
6.0
1.6
26.4
0.1
2.3
5.4
3.3
18
Stinkweed
9.6
0.8
8.8
0.1
0.6
1.6
3.2
19
Stork's-bill
6.1
0.4
7.3
< 0.1
0.3
0.6
1.9
20
Cleavers
3.7
0.8
22.4
0.1
1.5
3.6
1.8
21
Pale smartweed
5.1
0.4
7.2
< 0.1
0.6
1.0
1.6
22
Barnyard grass
1.4
0.4
25.0
0.1
6.2
6.2
1.0
23
Wild tomato
2.3
0.3
15.0
< 0.1
1.4
1.4
1.0
24
Field bindweed
2.3
0.2
10.0
< 0.1
0.4
0.4
0.8
25
Corn spurry
2.3
0.2
10.0
< 0.1
0.4
0.4
0.8
26
Flixweed
2.3
0.1
5.0
< 0.1
0.2
0.2
0.6
27
Silky lupin
1.3
0.3
20.0
< 0.1
1.0
1.0
0.6
Table 62. 2009 irrigated corn in the Lethbridge Plain (793) Ecodistrict in the Moist Mixed Grassland
Ecoregion (16 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
88.2
29.6
33.5
7.0
7.9
55.8
87.5
2
Round-leaved mallow
64.5
20.7
32.1
1.6
2.5
11.0
40.8
3
Wild buckwheat
63.7
15.1
23.7
1.4
2.2
11.8
34.2
4
Dandelion
55.4
10.9
19.7
1.2
2.2
13.4
27.9
5
Quack grass
19.1
8.2
42.8
2.3
11.9
28.4
25.3
6
Kochia
43.5
8.2
18.9
0.6
1.5
4.8
19.7
7
Lamb's-quarters
38.2
3.9
10.2
0.3
0.8
2.0
12.8
8
Alfalfa
21.8
4.4
20.0
0.3
1.3
3.6
9.8
9
Annual sow-thistle
21.0
2.8
13.3
0.1
0.7
1.4
7.4
10
Wild oats
11.8
3.7
31.6
0.2
1.6
2.8
6.7
11
Field bindweed
15.9
2.7
17.3
0.2
1.1
1.2
6.5
12
Chickweed
14.5
1.5
10.0
0.1
0.4
0.4
4.4
13
Stork's-bill
14.5
1.5
10.0
0.1
0.4
0.6
4.4
14
Green foxtail
13.2
1.1
8.5
0.1
0.4
0.8
3.9
15
Canada thistle
8.6
0.9
10.0
< 0.1
0.4
0.4
2.6
16
Oats
8.6
0.4
5.0
< 0.1
0.4
0.4
2.3
17
Shepherd's-purse
7.3
0.7
10.0
< 0.1
0.4
0.4
2.2
18
Canola (Argentine)
4.6
0.5
10.0
< 0.1
0.4
0.4
1.4