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Field Survey Summary Tables – Moist Mixed Grassland Ecoregion
49
Table 34. 2009 irrigated perennial crops in the Moist Mixed Grassland Ecoregion (27 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
68.4
46.0
67.3
11.8
17.3
98.6
174.4
2
Canada thistle
35.7
6.8
19.1
1.1
3.1
26.8
32.5
3
Lamb's-quarters
20.2
3.5
17.2
0.2
1.1
4.8
15.1
4
Redroot pigweed
14.0
3.0
21.3
0.5
3.4
11.0
13.4
5
Wild buckwheat
10.6
2.7
25.1
0.3
2.7
9.8
10.3
6
Kochia
12.1
1.1
9.1
0.4
3.0
10.2
9.2
7
Shepherd's-purse
8.4
1.4
17.2
0.1
1.5
3.4
6.5
8
Stinkweed
9.6
0.7
7.5
< 0.1
0.3
0.4
5.3
9
Quack grass
7.4
0.8
11.5
0.1
0.9
1.0
4.8
10
Canola (Argentine)
7.4
0.6
8.3
< 0.1
0.3
0.4
4.2
11
Prostrate knotweed
2.6
1.1
45.0
0.1
4.2
4.2
3.4
12
Alfalfa
6.6
0.3
5.0
< 0.1
0.2
0.2
3.4
13
Flixweed
4.8
0.5
10.0
< 0.1
0.4
0.4
2.9
14
Round-leaved mallow
4.8
0.2
5.0
< 0.1
0.2
0.2
2.5
15
Black medick
4.8
0.2
5.0
< 0.1
0.2
0.2
2.5
16
Perennial sow-thistle
4.8
0.2
5.0
< 0.1
0.2
0.2
2.5
17
Pale smartweed
2.6
0.6
25.0
0.1
2.0
2.0
2.3
18
Russian thistle
4.0
0.2
5.0
< 0.1
0.2
0.2
2.1
19
Barnyard grass
2.6
0.3
10.0
< 0.1
0.6
0.6
1.6
20
Field dock
2.6
0.1
5.0
< 0.1
0.2
0.2
1.3
Table 35. 2009 irrigated alfalfa in the Moist Mixed Grassland Ecoregion (14 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
85.8
57.6
67.1
15.9
18.5
98.6
204.0
2
Lamb's-quarters
22.0
3.1
14.0
0.3
1.2
4.8
15.6
3
Wild buckwheat
12.7
4.8
37.4
0.5
4.3
9.8
15.1
4
Canada thistle
14.2
2.1
14.8
0.1
1.0
1.4
10.0
5
Shepherd's-purse
9.8
2.5
25.0
0.2
1.9
3.4
8.8
6
Canola (Argentine)
14.2
1.2
8.3
< 0.1
0.3
0.4
8.3
7
Prostrate knotweed
4.9
2.2
45.0
0.2
4.2
4.2
6.3
8
Redroot pigweed
9.8
1.0
10.0
< 0.1
0.4
0.6
6.0
9
Flixweed
9.2
0.9
10.0
< 0.1
0.4
0.4
5.7
10
Stinkweed
9.2
0.9
10.0
< 0.1
0.4
0.4
5.7
11
Round-leaved mallow
9.2
0.5
5.0
< 0.1
0.2
0.2
5.0
12
Perennial sow-thistle
9.2
0.5
5.0
< 0.1
0.2
0.2
5.0
13
Pale smartweed
4.9
1.2
25.0
0.1
2.0
2.0
4.4