Basic HTML Version
Field Survey Summary Tables – Eastern Irrigation District
145
Table 171. 2009 irrigated perennial crops in Eastern Irrigation District (52 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Dandelion
94.2
61.3
65.1
12.2
12.9
51.6
171.5
2
Canada thistle
34.6
6.1
17.5
0.5
1.4
9.4
21.7
3
Smooth brome
21.2
5.8
27.3
1.0
4.6
30.6
19.5
4
Lamb's-quarters
17.3
4.1
23.9
0.8
4.7
31.2
15.4
5
Kochia
17.3
3.3
18.9
0.8
4.6
31.4
14.4
6
Quack grass
9.6
1.9
20.0
0.4
3.9
13.0
7.7
7
Wild buckwheat
7.7
1.7
22.5
0.1
1.6
2.6
5.3
8
Perennial sow-thistle
5.8
1.9
33.3
0.2
3.1
7.6
5.2
9
Wild oats
9.6
1.1
11.0
0.1
0.7
1.8
5.0
10
Barnyard grass
5.8
1.5
26.7
0.2
3.0
5.2
4.7
11
Narrow-leaved hawk's-beard
5.8
1.5
26.7
0.1
1.5
2.2
4.2
12
Foxtail barley
7.7
0.7
8.8
< 0.1
0.6
0.8
3.7
13
Spiny annual sow-thistle
5.8
0.8
13.3
0.1
0.9
1.4
3.2
14
Shepherd's-purse
5.8
0.5
8.3
< 0.1
0.5
0.8
2.7
15
Russian thistle
5.8
0.3
5.0
< 0.1
0.2
0.2
2.4
16
Annual sow-thistle
3.8
0.7
17.5
0.1
1.3
2.4
2.4
17
Redroot pigweed
3.8
0.3
7.5
< 0.1
0.4
0.4
1.8
18
Green foxtail
1.9
0.6
30.0
0.1
4.0
4.0
1.8
19
Curled dock
3.8
0.3
7.5
< 0.1
0.3
0.4
1.8
20
White sweet-clover
1.9
0.3
15.0
< 0.1
2.0
2.0
1.2
21
Common burdock
1.9
0.2
10.0
< 0.1
1.4
1.4
1.1
22
Silver sagebrush
1.9
0.2
10.0
< 0.1
0.4
0.4
0.9
23
Showy milkweed
1.9
0.1
5.0
< 0.1
0.4
0.4
0.8
24
Round-leaved mallow
1.9
0.1
5.0
< 0.1
0.2
0.2
0.8
25
Broad-leaved plantain
1.9
0.1
5.0
< 0.1
0.2
0.2
0.8