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Field Survey Summary Tables – Moist Mixed Grassland Ecoregion
45
Table 28. 2009 irrigated cereal crops in the Moist Mixed Grassland Ecoregion (120 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
43.5
16.0
36.8
4.6
10.5
73.4
47.8
2
Wild buckwheat
55.9
16.2
29.0
1.9
3.5
25.6
37.9
3
Wild oats
40.4
11.3
28.0
2.1
5.1
47.0
30.4
4
Kochia
37.8
8.2
21.8
1.7
4.5
89.6
25.1
5
Canola (Argentine)
26.0
10.5
40.5
1.6
6.1
36.4
23.8
6
Round-leaved mallow
35.3
7.8
22.0
0.8
2.3
28.6
19.6
7
Chickweed
9.7
2.5
25.3
3.0
30.6
206.0
19.2
8
Lamb's-quarters
30.6
6.7
22.0
0.8
2.7
34.8
17.7
9
Dandelion
33.8
5.7
16.7
0.5
1.3
13.4
15.5
10
Annual sow-thistle
16.0
4.4
27.4
0.6
3.9
27.2
10.9
11
Canada thistle
17.3
3.8
21.6
0.4
2.2
13.2
9.5
12
Alfalfa
10.0
2.1
20.6
0.8
7.6
106.2
8.0
13
Quack grass
9.7
2.6
26.9
0.6
6.7
28.4
7.9
14
Shepherd's-purse
5.4
1.5
27.5
0.2
3.3
15.8
3.5
15
Perennial sow-thistle
6.2
1.2
18.9
0.2
2.8
19.6
3.4
16
Prostrate knotweed
6.0
1.1
18.0
0.1
1.9
7.6
3.0
17
Field bindweed
5.8
0.9
16.0
0.1
0.9
1.6
2.5
18
Cleavers
3.5
1.1
30.7
0.1
1.8
3.6
2.2
19
Stork's-bill
5.7
0.4
7.9
< 0.1
0.3
0.6
1.8
20
Prickly lettuce
2.6
0.7
26.4
0.1
2.3
5.4
1.6
21
Pale smartweed
4.1
0.4
10.8
< 0.1
0.7
1.2
1.5
22
Stinkweed
4.2
0.4
8.8
< 0.1
0.6
1.6
1.5
23
Green foxtail
2.8
0.3
9.0
< 0.1
0.6
1.0
1.0
24
Foxtail barley
0.6
0.2
40.0
0.1
15.2
15.2
0.8
25
Spiny annual sow-thistle
0.9
0.3
30.0
0.1
6.2
6.2
0.8
26
Barnyard grass
0.6
0.2
25.0
< 0.1
6.2
6.2
0.5
27
Wild tomato
1.0
0.1
15.0
< 0.1
1.4
1.4
0.4
28
Downy brome
1.2
0.1
10.0
< 0.1
0.4
0.4
0.4
29
Narrow-leaved hawk's-beard
1.4
0.1
5.0
< 0.1
0.2
0.2
0.4
30
Oats
1.2
0.1
5.0
< 0.1
0.4
0.4
0.4
31
Corn spurry
1.0
0.1
10.0
< 0.1
0.4
0.4
0.3
32
Flixweed
1.0
< 0.1
5.0
< 0.1
0.2
0.2
0.3
33
Silky lupin
0.6
0.1
20.0
< 0.1
1.0
1.0
0.3