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Field Survey Summary Tables – Ecodistrict 793
75
Table 67. 2009 irrigated grass hay in the Lethbridge Plain (793) Ecodistrict in the Moist Mixed Grassland
Ecoregion (12 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
44.9
33.4
74.3
7.7
17.1
47.0
131.6
2
Canada thistle
55.1
12.1
22.0
2.3
4.2
26.8
58.8
3
Redroot pigweed
20.1
5.6
27.9
1.0
5.1
11.0
24.9
4
Kochia
27.6
2.5
9.1
0.8
3.0
10.2
21.2
5
Lamb's-quarters
20.1
4.3
21.3
0.2
1.0
1.6
16.0
6
Quack grass
16.7
1.9
11.5
0.2
0.9
1.0
10.7
7
Alfalfa
15.0
0.7
5.0
< 0.1
0.2
0.2
7.2
8
Black medick
10.9
0.5
5.0
< 0.1
0.2
0.2
5.2
9
Stinkweed
10.9
0.5
5.0
< 0.1
0.2
0.2
5.2
10
Wild buckwheat
9.2
0.5
5.0
< 0.1
0.2
0.2
4.4
11
Russian thistle
9.2
0.5
5.0
< 0.1
0.2
0.2
4.4
12
Shepherd's-purse
7.5
0.4
5.0
0.1
0.8
0.8
4.0
13
Barnyard grass
5.8
0.6
10.0
< 0.1
0.6
0.6
3.4
14
Field dock
5.8
0.3
5.0
< 0.1
0.2
0.2
2.8