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Field Survey Summary Tables – Mixed Grassland Ecoregion
59
Table 44. 2009 irrigated canola in the Mixed Grassland Ecoregion (46 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
30.8
6.8
22.0
1.2
4.0
24.2
48.9
2
Wild buckwheat
43.7
8.9
20.4
0.5
1.1
5.0
44.8
3
Smooth brome
4.8
3.6
75.0
1.7
34.9
61.6
40.5
4
Kochia
45.5
5.3
11.7
0.3
0.6
2.0
33.5
5
Dandelion
16.9
3.3
19.8
0.2
1.2
4.4
17.5
6
Green foxtail
10.4
2.9
28.0
0.4
3.6
15.8
17.2
7
Lamb's-quarters
19.2
2.5
12.8
0.1
0.6
2.6
14.8
8
Round-leaved mallow
12.2
2.6
21.2
0.2
1.4
2.4
13.5
9
Barnyard grass
5.0
1.6
32.2
0.3
5.1
11.8
10.0
10
Redroot pigweed
14.5
1.2
8.6
0.1
0.5
1.2
9.4
11
Quack grass
6.2
0.9
15.0
0.1
1.3
1.6
5.9
12
Barley
2.1
0.9
45.0
0.2
7.4
7.4
5.6
13
Wheat
6.6
0.6
9.7
0.1
1.0
2.0
5.1
14
Canada thistle
8.6
0.5
6.2
< 0.1
0.3
0.4
4.9
15
Perennial sow-thistle
4.8
0.7
15.0
< 0.1
0.8
0.8
4.1
16
Downy brome
2.9
0.7
25.0
< 0.1
1.6
1.6
3.5
17
Wild tomato
4.7
0.4
7.5
< 0.1
1.0
1.4
3.4
18
Spiny annual sow-thistle
2.4
0.5
20.0
< 0.1
1.2
1.2
2.5
19
Foxtail barley
4.1
0.2
5.0
< 0.1
0.6
1.0
2.5
20
Sunflower species
2.1
0.4
20.0
< 0.1
1.6
1.6
2.3
21
Chickweed
2.1
0.4
20.0
< 0.1
1.0
1.0
2.1
22
Alfalfa
2.1
0.4
20.0
< 0.1
0.8
0.8
2.0
23
Ball mustard
2.4
0.1
5.0
< 0.1
0.2
0.2
1.3
24
Stinkweed
2.3
0.1
5.0
< 0.1
0.2
0.2
1.2
25
Russian thistle
2.3
0.1
5.0
< 0.1
0.2
0.2
1.2
26
Japanese brome
2.1
0.1
5.0
< 0.1
0.2
0.2
1.1
27
Flixweed
2.1
0.1
5.0
< 0.1
0.2
0.2
1.1
Table 45. 2009 irrigated dry beans in the Mixed Grassland Ecoregion (26 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
27.7
3.2
11.4
0.2
0.7
1.2
56.3
2
Wild oats
23.5
3.0
12.8
0.1
0.6
1.2
47.8
3
Canada thistle
10.4
1.2
11.8
0.4
3.5
7.0
41.3
4
Wheat
3.7
1.3
35.0
0.3
8.0
8.0
31.7
5
Wild buckwheat
20.2
1.6
8.1
0.1
0.3
0.8
31.3
6
Barnyard grass
3.7
1.9
50.0
0.1
3.2
3.2
22.8
7
Round-leaved mallow
4.2
0.8
20.0
< 0.1
1.0
1.0
11.6
8
Field bindweed
3.7
0.6
15.0
0.1
1.6
1.6
10.7
9
Prostrate pigweed
4.2
0.6
15.0
< 0.1
0.6
0.6
9.1
10
Dandelion
3.7
0.6
15.0
< 0.1
0.8
0.8
8.6
11
Redroot pigweed
3.7
0.6
15.0
< 0.1
0.8
0.8
8.6
12
Sunflower species
3.7
0.4
10.0
< 0.1
1.0
1.0
8.0
13
Showy milkweed
3.7
0.4
10.0
< 0.1
0.8
0.8
7.5
14
Canola (Argentine)
3.7
0.2
5.0
< 0.1
0.2
0.2
4.8