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Field Survey Summary Tables – Mixed Grassland Ecoregion
58
Table 43. 2009 irrigated broad-leaved annual crops in the Mixed Grassland Ecoregion (108 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
21.9
4.6
21.1
0.6
3.0
24.2
40.5
2
Wild buckwheat
31.0
5.2
16.6
0.3
0.9
5.0
36.0
3
Kochia
34.0
3.7
10.9
0.3
0.9
13.6
34.8
4
Smooth brome
2.1
1.6
75.0
0.7
34.9
61.6
24.8
5
Redroot pigweed
13.6
2.4
17.7
0.2
1.7
13.4
19.2
6
Lamb's-quarters
16.2
2.3
14.0
0.1
0.8
3.8
17.4
7
Barnyard grass
5.8
2.3
39.4
0.3
4.6
11.8
16.1
8
Round-leaved mallow
10.1
2.2
22.0
0.2
1.5
5.0
15.1
9
Green foxtail
6.3
1.9
29.3
0.2
3.5
15.8
14.1
10
Dandelion
11.1
1.7
15.6
0.1
0.9
4.4
12.8
11
Wheat
6.4
1.2
18.1
0.2
2.4
8.0
10.3
12
Canada thistle
8.8
0.7
8.5
0.1
1.2
7.0
9.1
13
Canola (Argentine)
5.4
0.7
12.5
< 0.1
0.5
1.0
5.2
14
Alfalfa
3.6
0.8
22.5
< 0.1
1.2
2.4
5.1
15
Quack grass
3.6
0.5
12.5
< 0.1
1.1
1.6
4.0
16
Barley
0.9
0.4
45.0
0.1
7.4
7.4
3.3
17
Foxtail barley
3.9
0.2
6.3
< 0.1
0.4
1.0
3.0
18
Downy brome
2.2
0.4
16.6
< 0.1
1.4
1.6
2.8
19
Persian darnel
1.0
0.3
30.0
0.1
5.0
5.0
2.8
20
Wild tomato
2.7
0.2
6.9
< 0.1
0.8
1.4
2.4
21
Perennial sow-thistle
2.1
0.3
15.0
< 0.1
0.8
0.8
2.3
22
Sunflower species
1.8
0.3
15.0
< 0.1
1.3
1.6
2.2
23
Stinkweed
2.8
0.1
5.0
< 0.1
0.2
0.2
1.9
24
Spiny annual sow-thistle
1.0
0.2
20.0
< 0.1
1.2
1.2
1.4
25
Flixweed
1.8
0.1
5.0
< 0.1
0.2
0.2
1.2
26
Field bindweed
0.9
0.1
15.0
< 0.1
1.6
1.6
1.2
27
Chickweed
0.9
0.2
20.0
< 0.1
1.0
1.0
1.2
28
Purslane
0.9
0.1
15.0
< 0.1
1.4
1.4
1.1
29
Prostrate pigweed
1.0
0.2
15.0
< 0.1
0.6
0.6
1.1
30
Common groundsel
0.9
0.1
15.0
< 0.1
0.8
0.8
1.0
31
Showy milkweed
0.9
0.1
10.0
< 0.1
0.8
0.8
0.9
32
Stork's-bill
0.9
0.1
10.0
< 0.1
0.6
0.6
0.8
33
Cleavers
0.9
0.1
10.0
< 0.1
0.4
0.4
0.8
34
Pale smartweed
0.9
0.1
10.0
< 0.1
0.4
0.4
0.8
35
Ball mustard
1.0
0.1
5.0
< 0.1
0.2
0.2
0.7
36
Russian thistle
1.0
0.1
5.0
< 0.1
0.2
0.2
0.7
37
Corn
0.7
0.1
10.0
< 0.1
0.4
0.4
0.6
38
Japanese brome
0.9
< 0.1
5.0
< 0.1
0.2
0.2
0.6
39
Goat's-beard
0.9
< 0.1
5.0
< 0.1
0.2
0.2
0.6