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Field Survey Summary Tables – Moist Mixed Grassland Ecoregion
43
Table 26. 2009 irrigated crops in the Moist Mixed Grassland Ecoregion (168 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
39.2
12.4
31.7
3.3
8.5
73.4
42.5
2
Dandelion
37.2
12.3
33.0
2.4
6.4
98.6
36.4
3
Wild buckwheat
45.4
12.3
27.1
1.4
3.1
25.6
33.1
4
Wild oats
31.0
8.8
28.3
1.5
4.9
47.0
26.1
5
Kochia
34.6
6.9
20.1
1.3
3.8
89.6
24.0
6
Canola (Argentine)
20.0
7.7
38.4
1.1
5.7
36.4
19.9
7
Lamb's-quarters
27.4
6.3
22.9
0.7
2.5
34.8
17.8
8
Round-leaved mallow
28.4
5.7
19.9
0.6
2.0
28.6
16.7
9
Chickweed
7.3
1.8
24.7
2.1
28.8
206.0
15.8
10
Canada thistle
21.9
4.4
20.2
0.5
2.3
26.8
13.3
11
Annual sow-thistle
15.1
3.8
25.4
0.5
3.2
27.2
10.8
12
Quack grass
9.9
2.1
21.1
0.5
4.8
28.4
7.5
13
Alfalfa
8.2
1.5
18.4
0.5
6.6
106.2
6.8
14
Shepherd's-purse
7.3
1.4
19.5
0.2
2.2
15.8
4.3
15
Perennial sow-thistle
5.2
0.9
16.7
0.1
2.4
19.6
3.0
16
Prostrate knotweed
4.7
1.0
20.6
0.1
2.1
7.6
2.8
17
Cleavers
3.6
1.1
29.5
0.1
1.7
3.6
2.4
18
Stinkweed
6.0
0.5
8.9
< 0.1
0.5
1.6
2.3
19
Field bindweed
4.1
0.6
16.0
< 0.1
0.9
1.6
1.9
20
Pale smartweed
3.3
0.4
12.6
< 0.1
0.8
2.0
1.5
21
Wheat
1.1
0.6
49.8
0.1
8.8
13.4
1.5
22
Stork's-bill
4.0
0.3
7.9
< 0.1
0.3
0.6
1.4
23
Prickly lettuce
1.8
0.5
26.4
< 0.1
2.3
5.4
1.2
24
Green foxtail
2.4
0.2
8.3
< 0.1
0.6
1.0
0.9
25
Russian thistle
1.4
0.2
17.5
< 0.1
1.8
3.4
0.8
26
Foxtail barley
0.4
0.2
40.0
0.1
15.2
15.2
0.6
27
Spiny annual sow-thistle
0.7
0.2
30.0
< 0.1
6.2
6.2
0.6
28
Barnyard grass
0.9
0.2
17.5
< 0.1
3.4
6.2
0.6
29
Flixweed
1.5
0.1
7.7
< 0.1
0.3
0.4
0.5
30
Corn spurry
1.4
0.1
7.5
< 0.1
0.3
0.4
0.5
31
Barley
0.8
0.2
20.0
< 0.1
1.2
1.2
0.4
32
Wild tomato
0.7
0.1
15.0
< 0.1
1.4
1.4
0.3
33
Downy brome
0.8
0.1
10.0
< 0.1
0.4
0.4
0.3
34
Narrow-leaved hawk's-beard
1.0
< 0.1
5.0
< 0.1
0.2
0.2
0.3
35
Oats
0.8
< 0.1
5.0
< 0.1
0.4
0.4
0.3
36
Black medick
0.8
< 0.1
5.0
< 0.1
0.2
0.2
0.3
37
Silky lupin
0.4
0.1
20.0
< 0.1
1.0
1.0
0.2
38
Field dock
0.4
< 0.1
5.0
< 0.1
0.2
0.2
0.1
39
Millet
0.4
< 0.1
5.0
< 0.1
0.2
0.2
0.1