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Field Survey Summary Tables – Ecodistricts 812 & 806
79
Table 71. 2009 irrigated spring wheat in the Brooks Plain & Berry Creek Plain Ecodistricts (812 & 806) in
the Mixed Grassland Ecoregion (29 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Alfalfa
34.5
16.7
48.5
3.9
11.4
36.8
50.3
2
Canola (Argentine)
41.4
14.8
35.8
2.5
6.1
32.4
39.8
3
Dandelion
48.3
14.3
29.6
1.3
2.6
6.0
31.4
4
Wild buckwheat
58.6
14.0
23.8
1.0
1.7
11.2
31.2
5
Lamb's-quarters
41.4
9.5
22.9
1.1
2.7
15.8
24.8
6
Green foxtail
34.5
9.5
27.5
0.8
2.3
5.6
20.9
7
Wild oats
37.9
5.3
14.1
0.7
1.8
5.8
17.2
8
Kochia
44.8
5.5
12.3
0.3
0.7
2.4
16.0
9
Canada thistle
27.6
6.2
22.5
0.3
1.3
2.4
13.4
10
Round-leaved mallow
24.1
4.5
18.6
0.3
1.4
3.4
11.2
11
Redroot pigweed
17.2
2.1
12.0
0.2
1.2
4.8
6.8
12
Foxtail barley
10.3
1.9
18.3
0.3
3.1
5.6
6.0
13
Smooth brome
6.9
2.4
35.0
0.2
2.8
3.2
4.9
14
Spiny annual sow-thistle
6.9
1.6
22.5
0.1
1.6
2.8
3.5
15
Shepherd's-purse
10.3
0.9
8.3
0.1
0.7
1.0
3.4
16
Annual sow-thistle
6.9
1.6
22.5
0.1
1.1
1.4
3.3
17
Narrow-leaved hawk's-beard
6.9
0.7
10.0
< 0.1
0.7
1.2
2.3
18
Chickweed
6.9
0.5
7.5
< 0.1
0.5
0.8
2.1
19
Pale smartweed
6.9
0.5
7.5
< 0.1
0.5
0.6
2.1
20
Broad-leaved plantain
3.4
0.9
25.0
0.1
2.2
2.2
2.0
21
Russian thistle
6.9
0.3
5.0
< 0.1
0.3
0.4
1.8
22
Quack grass
3.4
0.5
15.0
< 0.1
1.4
1.4
1.5
23
Barnyard grass
3.4
0.3
10.0
< 0.1
0.4
0.4
1.1
24
Perennial sow-thistle
3.4
0.3
10.0
< 0.1
0.4
0.4
1.1
25
Cleavers
3.4
0.2
5.0
< 0.1
0.2
0.2
0.9
26
Stinkweed
3.4
0.2
5.0
< 0.1
0.2
0.2
0.9
Table 72. 2009 irrigated barley in the Brooks Plain & Berry Creek Plain Ecodistricts (812 & 806) in the
Mixed Grassland Ecoregion (12 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
58.3
20.0
34.3
5.2
8.9
32.6
57.6
2
Wild buckwheat
91.7
26.7
29.1
1.9
2.1
5.2
53.3
3
Lamb's-quarters
50.0
22.5
45.0
4.3
8.6
29.4
53.2
4
Redroot pigweed
50.0
14.2
28.3
5.2
10.3
58.6
50.5
5
Kochia
50.0
7.1
14.2
0.3
0.6
1.4
18.7
6
Dandelion
41.7
5.4
13.0
0.3
0.7
1.8
15.4
7
Green foxtail
33.3
7.1
21.3
0.3
1.0
1.6
15.2
8
Shepherd's-purse
16.7
4.6
27.5
0.3
1.8
3.0
9.2
9
Pale smartweed
16.7
2.1
12.5
0.3
2.0
3.8
7.2
10
Quack grass
8.3
1.3
15.0
0.6
7.4
7.4
6.2
11
Canada thistle
16.7
2.1
12.5
0.1
0.8
1.4
6.2
12
Alfalfa
8.3
0.8
10.0
0.1
0.6
0.6
2.8
13
Wheat
8.3
0.4
5.0
< 0.1
0.4
0.4
2.4
14
Russian thistle
8.3
0.4
5.0
< 0.1
0.2
0.2
2.3