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Field Survey Summary Tables – Lethbridge Northern Irrigation District
150
Table 177. 2009 irrigated barley in Lethbridge Northern Irrigation District (33 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
54.7
21.4
39.1
6.7
12.3
73.4
63.0
2
Chickweed
9.3
3.7
40.0
6.4
69.1
206.0
34.6
3
Wild buckwheat
59.7
12.9
21.6
1.6
2.7
17.2
32.8
4
Lamb's-quarters
49.0
12.2
24.8
1.4
2.8
21.8
28.7
5
Kochia
39.7
9.3
23.3
1.6
4.1
33.6
25.1
6
Wild oats
41.7
8.6
20.7
0.9
2.1
7.2
21.5
7
Round-leaved mallow
36.0
5.7
15.8
0.5
1.4
5.0
15.7
8
Canola (Argentine)
21.1
7.3
34.5
0.8
3.7
11.6
15.2
9
Dandelion
23.6
4.6
19.6
0.4
1.6
7.0
11.4
10
Shepherd's-purse
11.8
4.1
34.9
0.5
4.6
15.8
9.0
11
Alfalfa
14.3
2.2
15.6
0.2
1.1
2.0
6.0
12
Canada thistle
12.4
1.9
15.0
0.1
1.2
2.6
5.2
13
Perennial sow-thistle
12.4
1.4
11.3
0.1
1.0
2.2
4.6
14
Prostrate knotweed
11.8
1.4
11.6
0.2
1.3
4.2
4.6
15
Annual sow-thistle
9.3
1.7
18.3
0.1
0.9
1.8
4.1
16
Prickly lettuce
6.2
1.9
30.0
0.2
2.8
5.4
3.9
17
Stinkweed
11.2
1.1
9.5
0.1
0.6
1.6
3.8
18
Quack grass
5.6
1.2
21.6
0.3
4.5
8.0
3.5
19
Wild tomato
3.1
0.5
15.0
< 0.1
1.4
1.4
1.3
20
Pale smartweed
3.1
0.3
10.0
< 0.1
1.0
1.0
1.1
21
Field bindweed
3.1
0.3
10.0
< 0.1
0.4
0.4
1.0
22
Corn spurry
3.1
0.3
10.0
< 0.1
0.4
0.4
1.0
23
Cleavers
3.1
0.2
5.0
< 0.1
0.2
0.2
0.9
24
Flixweed
3.1
0.2
5.0
< 0.1
0.2
0.2
0.9
25
Stork's-bill
2.5
0.1
5.0
< 0.1
0.2
0.2
0.7
Table 178. 2009 irrigated perennial crops in Lethbridge Northern Irrigation District (13 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
60.1
35.3
58.7
15.2
25.4
98.6
177.8
2
Canada thistle
38.3
9.3
24.2
2.0
5.3
26.8
49.0
3
Redroot pigweed
8.3
4.6
55.0
0.9
11.0
11.0
17.7
4
Kochia
15.0
1.8
11.7
0.7
4.8
10.2
15.4
5
Wild buckwheat
16.6
2.1
12.5
0.1
0.5
0.8
13.5
6
Lamb's-quarters
16.6
0.8
5.0
< 0.1
0.2
0.2
11.0
7
Russian thistle
8.3
0.4
5.0
< 0.1
0.2
0.2
5.5
8
Alfalfa
8.3
0.4
5.0
< 0.1
0.2
0.2
5.5
9
Shepherd's-purse
6.7
0.3
5.0
0.1
0.8
0.8
4.7