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Field Survey Summary Tables – Ecodistrict 823
85
Table 80. 2009 irrigated fields in the Vauxhall Plain Ecodistrict (823) in the Mixed Grassland Ecoregion
(81 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
33.3
8.6
25.8
1.4
4.1
33.6
50.1
2
Wild buckwheat
26.4
4.9
18.7
0.4
1.6
12.4
26.4
3
Kochia
22.8
4.0
17.7
0.4
2.0
13.6
23.6
4
Dandelion
15.6
5.1
32.4
0.4
2.9
11.0
22.6
5
Smooth brome
4.2
2.2
51.7
1.0
23.4
61.6
20.3
6
Green foxtail
12.4
3.7
30.2
0.5
4.4
28.8
20.1
7
Perennial sow-thistle
10.7
3.7
34.6
0.5
4.4
15.6
18.4
8
Canada thistle
19.7
2.7
13.8
0.2
1.1
9.0
16.5
9
Redroot pigweed
13.6
2.2
16.4
0.2
1.5
9.0
12.9
10
Lamb's-quarters
7.7
2.4
31.2
0.3
3.4
11.8
11.5
11
Persian darnel
4.2
1.9
45.0
0.3
6.8
15.2
9.4
12
Canola (Argentine)
11.0
1.6
14.2
0.1
0.7
2.2
8.6
13
Foxtail barley
10.4
1.3
12.4
0.1
0.9
1.8
8.1
14
Stinkweed
6.8
1.7
24.5
0.1
1.9
4.6
7.8
15
Quack grass
7.4
1.1
14.6
0.2
2.4
4.2
7.7
16
Tartary buckwheat
4.2
0.7
16.7
0.1
1.4
2.2
3.9
17
Alfalfa
3.9
0.8
20.5
< 0.1
1.1
2.6
3.7
18
Wild mustard
1.4
1.0
75.0
0.1
5.6
5.6
3.7
19
White mustard
1.2
0.7
60.0
0.1
9.4
9.4
3.5
20
Spiny annual sow-thistle
2.6
0.8
29.3
0.1
2.3
3.6
3.4
21
Barnyard grass
2.6
0.7
25.8
< 0.1
1.7
3.2
3.0
22
Prickly lettuce
1.2
0.6
50.0
< 0.1
3.6
3.6
2.2
23
Wheat
2.8
0.3
12.5
< 0.1
0.9
1.6
2.2
24
Round-leaved mallow
2.4
0.4
15.0
< 0.1
1.0
1.4
2.0
25
Shepherd's-purse
1.5
0.4
25.0
< 0.1
3.0
3.0
2.0
26
Flixweed
3.6
0.2
5.0
< 0.1
0.2
0.2
1.9
27
Stork's-bill
1.5
0.4
25.0
< 0.1
1.6
1.6
1.7
28
Russian thistle
1.4
0.2
15.0
< 0.1
1.2
1.2
1.2
29
Rough cinquefoil
1.4
0.1
5.0
< 0.1
0.2
0.2
0.8
30
Ball mustard
1.4
0.1
5.0
< 0.1
0.2
0.2
0.8