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Field Survey Summary Tables – Ecodistricts 812 & 806
77
Table 69. 2009 irrigated annual crops in the Brooks Plain & Berry Creek Plain Ecodistricts (812 & 806) in
the Mixed Grassland Ecoregion (66 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
68.2
15.7
23.0
1.0
1.5
11.2
38.7
2
Lamb's-quarters
42.4
11.1
26.3
1.5
3.5
29.4
32.4
3
Wild oats
40.9
8.8
21.5
1.5
3.7
32.6
30.3
4
Dandelion
43.9
11.0
25.0
1.0
2.2
13.0
28.4
5
Alfalfa
18.2
7.6
41.7
1.7
9.6
36.8
26.0
6
Redroot pigweed
33.3
6.6
19.8
1.3
4.0
58.6
24.9
7
Canola (Argentine)
24.2
8.6
35.3
1.2
5.1
32.4
24.0
8
Green foxtail
31.8
8.6
26.9
0.8
2.5
15.8
21.9
9
Kochia
45.5
5.6
12.3
0.3
0.6
2.4
17.6
10
Canada thistle
19.7
3.7
18.8
0.2
1.1
2.4
9.7
11
Round-leaved mallow
10.6
2.0
18.6
0.1
1.4
3.4
5.5
12
Shepherd's-purse
10.6
1.7
15.7
0.1
1.0
3.0
4.8
13
Barnyard grass
6.1
1.5
25.0
0.2
3.4
11.8
4.5
14
Foxtail barley
6.1
0.9
15.0
0.1
2.4
5.6
3.4
15
Smooth brome
4.5
1.2
26.7
0.1
2.1
3.2
3.0
16
Quack grass
4.5
0.5
11.7
0.2
3.5
7.4
2.8
17
Wheat
6.1
0.8
12.5
0.1
1.4
2.0
2.7
18
Annual sow-thistle
4.5
1.1
23.3
0.1
1.5
2.2
2.6
19
Pale smartweed
6.1
0.6
10.0
0.1
1.3
3.8
2.5
20
Spiny annual sow-thistle
4.5
1.0
21.7
0.1
1.5
2.8
2.5
21
Narrow-leaved hawk's-beard
4.5
0.7
15.0
< 0.1
1.0
1.6
2.0
22
Barley
1.5
0.7
45.0
0.1
7.4
7.4
1.9
23
Chickweed
4.5
0.5
11.7
< 0.1
0.7
1.0
1.8
24
Russian thistle
4.5
0.2
5.0
< 0.1
0.3
0.4
1.3
25
Stinkweed
4.5
0.2
5.0
< 0.1
0.2
0.2
1.3
26
Broad-leaved plantain
1.5
0.4
25.0
< 0.1
2.2
2.2
1.0
27
Cleavers
3.0
0.2
7.5
< 0.1
0.3
0.4
1.0
28
Stork's-bill
1.5
0.2
10.0
< 0.1
0.6
0.6
0.6
29
Perennial sow-thistle
1.5
0.2
10.0
< 0.1
0.4
0.4
0.5
30
Japanese brome
1.5
0.1
5.0
< 0.1
0.2
0.2
0.4