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Field Survey Summary Tables – Moist Mixed Grassland Ecoregion
44
Table 27. 2009 irrigated annual crops in the Moist Mixed Grassland Ecoregion (141 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
44.5
14.4
32.3
3.9
8.8
73.4
47.0
2
Wild buckwheat
52.6
14.3
27.2
1.7
3.2
25.6
36.3
3
Wild oats
37.5
10.6
28.3
1.8
4.9
47.0
29.9
4
Kochia
39.2
8.1
20.8
1.5
3.9
89.6
26.2
5
Canola (Argentine)
22.6
9.2
40.5
1.4
6.0
36.4
22.3
6
Round-leaved mallow
33.3
6.8
20.3
0.7
2.1
28.6
18.7
7
Chickweed
8.8
2.2
24.7
2.5
28.8
206.0
18.4
8
Lamb's-quarters
28.9
6.9
23.7
0.8
2.8
34.8
18.3
9
Dandelion
30.7
5.3
17.1
0.4
1.3
13.4
15.0
10
Annual sow-thistle
18.3
4.6
25.4
0.6
3.2
27.2
12.3
11
Canada thistle
19.0
3.9
20.6
0.4
2.0
13.2
10.6
12
Quack grass
10.5
2.4
22.5
0.6
5.3
28.4
8.0
13
Alfalfa
8.5
1.7
20.6
0.6
7.6
106.2
7.4
14
Shepherd's-purse
7.1
1.4
20.1
0.2
2.4
15.8
4.1
15
Perennial sow-thistle
5.3
1.0
18.9
0.1
2.8
19.6
3.1
16
Cleavers
4.4
1.3
29.5
0.1
1.7
3.6
2.8
17
Prostrate knotweed
5.1
0.9
18.0
0.1
1.9
7.6
2.7
18
Field bindweed
4.9
0.8
16.0
< 0.1
0.9
1.6
2.2
19
Stinkweed
5.3
0.5
9.5
< 0.1
0.6
1.6
1.9
20
Wheat
1.4
0.7
49.8
0.1
8.8
13.4
1.7
21
Stork's-bill
4.8
0.4
7.9
< 0.1
0.3
0.6
1.6
22
Prickly lettuce
2.2
0.6
26.4
0.1
2.3
5.4
1.4
23
Pale smartweed
3.5
0.4
10.8
< 0.1
0.7
1.2
1.4
24
Green foxtail
2.9
0.2
8.3
< 0.1
0.6
1.0
1.0
25
Foxtail barley
0.5
0.2
40.0
0.1
15.2
15.2
0.7
26
Spiny annual sow-thistle
0.8
0.2
30.0
< 0.1
6.2
6.2
0.7
27
Russian thistle
0.8
0.3
30.0
< 0.1
3.4
3.4
0.6
28
Corn spurry
1.7
0.1
7.5
< 0.1
0.3
0.4
0.6
29
Barley
1.0
0.2
20.0
< 0.1
1.2
1.2
0.5
30
Barnyard grass
0.5
0.1
25.0
< 0.1
6.2
6.2
0.4
31
Wild tomato
0.8
0.1
15.0
< 0.1
1.4
1.4
0.4
32
Downy brome
1.0
0.1
10.0
< 0.1
0.4
0.4
0.4
33
Narrow-leaved hawk's-beard
1.2
0.1
5.0
< 0.1
0.2
0.2
0.4
34
Oats
1.0
< 0.1
5.0
< 0.1
0.4
0.4
0.3
35
Flixweed
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.3
36
Silky lupin
0.5
0.1
20.0
< 0.1
1.0
1.0
0.2
37
Millet
0.5
< 0.1
5.0
< 0.1
0.2
0.2
0.2