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Field Survey Summary Tables – Ecodistrict 823
88
Table 83. 2009 irrigated spring wheat in the Vauxhall Plain Ecodistrict (823) in the Mixed Grassland
Ecoregion (27 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
49.2
11.8
24.1
1.1
2.3
12.4
55.3
2
Wild oats
36.9
8.7
23.6
1.6
4.2
33.6
51.9
3
Kochia
34.1
6.7
19.8
0.4
1.3
2.6
30.4
4
Green foxtail
22.4
5.0
22.3
0.4
1.8
6.4
22.6
5
Perennial sow-thistle
7.8
4.2
53.0
0.6
7.8
14.2
19.2
6
Dandelion
8.1
4.0
49.8
0.5
6.6
11.0
17.9
7
Lamb's-quarters
8.7
2.9
33.3
0.5
6.2
11.8
16.2
8
Canada thistle
25.4
2.4
9.3
0.2
0.6
1.4
15.5
9
Redroot pigweed
19.6
1.2
5.9
0.1
0.7
1.6
11.2
10
Canola (Argentine)
11.5
2.2
18.9
0.1
1.1
2.2
9.8
11
Stinkweed
4.2
1.9
45.0
0.2
4.6
4.6
7.7
12
Prickly lettuce
3.6
1.8
50.0
0.1
3.6
3.6
6.4
13
Spiny annual sow-thistle
3.6
1.5
40.0
0.1
3.6
3.6
5.8
14
Round-leaved mallow
7.3
1.1
15.0
0.1
1.0
1.4
5.6
15
Shepherd's-purse
4.5
1.1
25.0
0.1
3.0
3.0
5.6
16
Foxtail barley
7.8
0.8
9.6
0.1
0.8
1.6
5.1
17
Stork's-bill
4.5
1.1
25.0
0.1
1.6
1.6
4.6
18
Russian thistle
4.2
0.6
15.0
0.1
1.2
1.2
3.4
19
Alfalfa
4.5
0.2
5.0
< 0.1
0.2
0.2
2.1
20
Persian darnel
4.2
0.2
5.0
< 0.1
0.2
0.2
2.0
21
Flixweed
3.6
0.2
5.0
< 0.1
0.2
0.2
1.7