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Field Survey Summary Tables – Ecodistricts 812 & 806
78
Table 70. 2009 irrigated cereal crops in the Brooks Plain & Berry Creek Plain Ecodistricts (812 & 806) in
the Mixed Grassland Ecoregion (48 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
66.7
16.1
24.2
1.1
1.7
11.2
36.2
2
Lamb's-quarters
45.8
13.8
30.0
1.9
4.2
29.4
35.3
3
Alfalfa
25.0
10.4
41.7
2.4
9.6
36.8
31.4
4
Dandelion
47.9
13.1
27.4
1.2
2.5
13.0
30.0
5
Canola (Argentine)
33.3
11.8
35.3
1.7
5.1
32.4
29.3
6
Wild oats
37.5
8.2
21.9
1.7
4.5
32.6
27.1
7
Redroot pigweed
31.3
6.4
20.3
1.5
4.8
58.6
22.7
8
Green foxtail
31.3
7.6
24.3
0.6
1.8
5.6
17.2
9
Kochia
43.8
5.7
13.1
0.3
0.7
2.4
16.1
10
Canada thistle
22.9
4.9
21.4
0.3
1.2
2.4
11.1
11
Round-leaved mallow
14.6
2.7
18.6
0.2
1.4
3.4
6.9
12
Shepherd's-purse
14.6
2.3
15.7
0.1
1.0
3.0
6.1
13
Smooth brome
6.3
1.7
26.7
0.1
2.1
3.2
3.7
14
Foxtail barley
6.3
1.1
18.3
0.2
3.1
5.6
3.7
15
Annual sow-thistle
6.3
1.5
23.3
0.1
1.5
2.2
3.2
16
Pale smartweed
8.3
0.8
10.0
0.1
1.3
3.8
3.2
17
Spiny annual sow-thistle
6.3
1.4
21.7
0.1
1.5
2.8
3.2
18
Quack grass
4.2
0.6
15.0
0.2
4.4
7.4
2.7
19
Narrow-leaved hawk's-beard
6.3
0.9
15.0
0.1
1.0
1.6
2.6
20
Russian thistle
6.3
0.3
5.0
< 0.1
0.3
0.4
1.7
21
Chickweed
4.2
0.3
7.5
< 0.1
0.5
0.8
1.3
22
Barnyard grass
4.2
0.3
7.5
< 0.1
0.3
0.4
1.2
23
Broad-leaved plantain
2.1
0.5
25.0
< 0.1
2.2
2.2
1.2
24
Stinkweed
4.2
0.2
5.0
< 0.1
0.2
0.2
1.1
25
Perennial sow-thistle
2.1
0.2
10.0
< 0.1
0.4
0.4
0.7
26
Wheat
2.1
0.1
5.0
< 0.1
0.4
0.4
0.6
27
Cleavers
2.1
0.1
5.0
< 0.1
0.2
0.2
0.6