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Field Survey Summary Tables – Mixed Grassland Ecoregion
63
Table 50. 2009 irrigated grass hay in the Mixed Grassland Ecoregion (25 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
75.4
31.4
41.6
8.5
11.3
51.6
157.3
2
Foxtail barley
23.6
4.7
20.0
0.9
3.7
12.8
25.1
3
Canada thistle
31.7
4.5
14.3
0.3
1.0
2.2
23.3
4
Pasture sage
7.7
4.2
55.0
0.4
5.7
6.8
13.9
5
White sweet-clover
7.7
3.4
45.0
0.4
5.0
8.0
12.2
6
Wild buckwheat
7.7
2.7
35.0
0.2
2.4
3.8
9.2
7
Kochia
16.4
1.0
6.4
< 0.1
0.3
0.4
8.9
8
Smooth brome
7.7
1.7
22.5
0.1
1.6
2.0
7.0
9
Lamb's-quarters
8.1
1.0
12.7
0.1
0.8
0.8
5.6
10
Yellow sweet-clover
7.7
1.0
12.5
0.1
1.2
2.0
5.5
11
Goat's-beard
7.7
0.6
7.5
< 0.1
0.4
0.4
4.3
12
White clover
7.7
0.6
7.5
< 0.1
0.4
0.6
4.3
13
Wild oats
4.3
0.9
20.0
< 0.1
1.0
1.0
3.6
14
Prickly rose
3.8
0.8
20.0
0.1
2.2
2.2
3.6
15
Canola (Argentine)
4.3
0.6
15.0
< 0.1
0.8
0.8
3.1
16
Spiny annual sow-thistle
3.8
0.6
15.0
0.1
1.4
1.4
3.0
17
Rough cinquefoil
4.4
0.2
5.0
< 0.1
0.2
0.2
2.3
18
Redroot pigweed
3.8
0.2
5.0
< 0.1
0.6
0.6
2.1
19
Broad-leaved plantain
3.8
0.2
5.0
< 0.1
0.2
0.2
1.9
20
Bull thistle
3.8
0.2
5.0
< 0.1
0.2
0.2
1.9
21
Russian thistle
3.8
0.2
5.0
< 0.1
0.2
0.2
1.9