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Field Survey Summary Tables – Ecodistrict 828
94
Table 92. 2009 irrigated spring wheat in the Foremost Plain Ecodistrict (828) in the Mixed Grassland
Ecoregion (33 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
78.4
12.3
15.7
1.7
2.1
14.4
67.7
2
Kochia
63.8
10.7
16.8
1.0
1.5
7.2
50.4
3
Wild buckwheat
45.5
9.1
19.9
1.0
2.2
28.0
43.3
4
Lamb's-quarters
42.7
5.6
13.1
0.3
0.8
2.6
25.9
5
Spiny annual sow-thistle
2.1
2.1 100.0
1.2
57.6
57.6
23.8
6
Canada thistle
32.6
3.6
11.0
0.2
0.8
1.8
18.4
7
Redroot pigweed
21.8
2.2
10.0
0.1
0.5
0.8
11.0
8
Round-leaved mallow
15.2
2.2
14.2
0.1
0.9
2.2
9.7
9
Stinkweed
18.7
1.6
8.3
0.1
0.4
0.8
8.6
10
Green foxtail
7.0
1.0
15.0
0.2
3.0
4.4
6.9
11
Dandelion
9.1
1.4
15.9
0.1
0.9
1.8
6.1
12
Flixweed
12.5
0.8
6.3
< 0.1
0.3
0.4
5.0
13
Canola (Argentine)
9.7
0.5
5.0
< 0.1
0.4
1.0
4.0
14
Cow cockle
3.1
1.1
35.0
0.1
1.8
1.8
3.6
15
Wild tomato
6.2
0.5
7.5
< 0.1
0.8
1.2
3.2
16
Field bindweed
5.5
0.3
5.0
< 0.1
0.3
0.4
2.1
17
Pale smartweed
2.1
0.4
20.0
< 0.1
2.0
2.0
2.0
18
Downy brome
3.1
0.5
15.0
< 0.1
0.6
0.6
1.9
19
Russian thistle
3.1
0.3
10.0
< 0.1
0.4
0.4
1.5
20
Goat's-beard
3.8
0.2
5.0
< 0.1
0.2
0.2
1.4
21
Perennial sow-thistle
3.1
0.2
5.0
< 0.1
0.6
0.6
1.4
22
Annual sow-thistle
3.1
0.2
5.0
< 0.1
0.2
0.2
1.2
23
Alfalfa
2.1
0.1
5.0
< 0.1
0.2
0.2
0.8
Table 93. 2009 irrigated barley in the Foremost Plain Ecodistrict (828) in the Mixed Grassland Ecoregion
(13 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
68.9
21.6
31.4
3.4
4.9
14.6
105.0
2
Wild oats
54.7
20.0
36.6
2.6
4.8
10.0
87.3
3
Alfalfa
7.5
3.8
50.0
1.4
19.2
19.2
26.5
4
Canada thistle
22.6
3.0
13.3
0.3
1.4
2.2
18.3
5
Canola (Argentine)
15.1
4.5
30.0
0.3
2.1
2.2
17.7
6
Redroot pigweed
8.5
2.6
30.0
0.1
1.6
1.6
9.5
7
Round-leaved mallow
15.1
1.1
7.5
0.1
0.5
0.6
9.1
8
Sunflower species
7.5
0.8
10.0
0.1
0.8
0.8
5.2
9
Wild buckwheat
7.5
0.4
5.0
< 0.1
0.6
0.6
4.3
10
Lamb's-quarters
7.5
0.4
5.0
< 0.1
0.6
0.6
4.3
11
Perennial sow-thistle
7.5
0.4
5.0
< 0.1
0.6
0.6
4.3
12
Dandelion
7.5
0.4
5.0
< 0.1
0.4
0.4
4.2
13
Quack grass
7.5
0.4
5.0
< 0.1
0.4
0.4
4.2