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Field Survey Summary Tables – Ecodistrict 823
86
Table 81. 2009 irrigated annual crops in the Vauxhall Plain Ecodistrict (823) in the Mixed Grassland
Ecoregion (68 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
38.4
10.1
26.4
1.6
4.2
33.6
58.0
2
Wild buckwheat
31.5
5.9
18.7
0.5
1.6
12.4
31.4
3
Kochia
24.2
4.6
19.0
0.5
2.2
13.6
26.2
4
Smooth brome
5.0
2.6
51.7
1.2
23.4
61.6
23.6
5
Green foxtail
13.1
3.5
27.0
0.6
4.4
28.8
20.4
6
Perennial sow-thistle
9.7
3.8
39.0
0.5
5.4
15.6
18.8
7
Dandelion
8.0
2.6
32.1
0.3
3.4
11.0
12.0
8
Canada thistle
19.1
1.5
7.6
0.1
0.5
1.4
12.0
9
Persian darnel
5.0
2.2
45.0
0.3
6.8
15.2
11.2
10
Redroot pigweed
14.9
1.5
10.3
0.1
0.8
2.2
10.8
11
Lamb's-quarters
7.7
1.9
24.1
0.2
3.2
11.8
10.3
12
Canola (Argentine)
11.7
1.8
15.3
0.1
0.8
2.2
9.5
13
Stinkweed
8.1
2.0
24.5
0.2
1.9
4.6
9.3
14
Foxtail barley
6.4
0.6
9.8
< 0.1
0.8
1.6
4.6
15
Alfalfa
4.6
0.9
20.5
< 0.1
1.1
2.6
4.4
16
Wild mustard
1.7
1.2
75.0
0.1
5.6
5.6
4.4
17
White mustard
1.4
0.9
60.0
0.1
9.4
9.4
4.1
18
Spiny annual sow-thistle
3.1
0.9
29.3
0.1
2.3
3.6
4.0
19
Barnyard grass
3.1
0.8
25.8
0.1
1.7
3.2
3.5
20
Quack grass
3.1
0.6
18.4
0.1
2.0
3.6
3.3
21
Prickly lettuce
1.4
0.7
50.0
0.1
3.6
3.6
2.7
22
Wheat
3.3
0.4
12.5
< 0.1
0.9
1.6
2.6
23
Round-leaved mallow
2.9
0.4
15.0
< 0.1
1.0
1.4
2.4
24
Tartary buckwheat
3.3
0.2
7.5
< 0.1
1.0
1.4
2.3
25
Shepherd's-purse
1.8
0.4
25.0
0.1
3.0
3.0
2.3
26
Stork's-bill
1.8
0.4
25.0
< 0.1
1.6
1.6
2.0
27
Flixweed
2.9
0.1
5.0
< 0.1
0.2
0.2
1.5
28
Russian thistle
1.7
0.2
15.0
< 0.1
1.2
1.2
1.4
29
Ball mustard
1.7
0.1
5.0
< 0.1
0.2
0.2
0.9