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Field Survey Summary Tables – St. Mary River Irrigation District
155
Table 184. 2009 irrigated cereal crops in St. Mary River Irrigation District (105 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild buckwheat
55.1
15.6
28.2
1.9
3.4
28.0
42.6
2
Redroot pigweed
29.5
10.8
36.4
3.2
10.8
73.4
38.3
3
Wild oats
48.5
10.3
21.2
1.6
3.4
34.6
33.6
4
Kochia
42.6
8.3
19.5
1.8
4.3
89.6
30.9
5
Lamb's-quarters
36.1
7.8
21.6
1.5
4.1
35.8
26.7
6
Round-leaved mallow
24.6
4.8
19.7
0.6
2.3
28.6
15.0
7
Dandelion
25.8
4.5
17.6
0.4
1.4
7.4
13.8
8
Canola (Argentine)
17.7
4.5
25.4
0.7
3.9
36.4
13.6
9
Canada thistle
21.1
3.3
15.9
0.4
2.0
13.2
11.6
10
Annual sow-thistle
10.1
3.3
32.6
0.6
6.2
27.2
10.0
11
Alfalfa
7.0
2.3
32.3
0.9
13.4
106.2
9.8
12
Stinkweed
12.9
1.4
11.0
0.6
4.9
41.4
8.6
13
Chickweed
2.3
1.0
41.7
1.1
46.8
139.2
7.9
14
Green foxtail
10.1
1.7
17.0
0.3
3.1
13.0
6.3
15
Quack grass
4.6
1.4
30.0
0.3
7.2
22.0
4.6
16
Pale smartweed
8.7
0.9
10.5
0.1
0.9
2.0
3.7
17
Spiny annual sow-thistle
0.8
0.8 100.0
0.4
57.6
57.6
3.6
18
Perennial sow-thistle
2.6
0.8
31.1
0.2
6.0
19.6
2.5
19
Flixweed
5.8
0.4
7.1
< 0.1
0.5
1.2
2.1
20
Field bindweed
5.1
0.5
9.7
< 0.1
0.5
1.6
2.0
21
Foxtail barley
2.0
0.1
7.5
0.2
7.8
15.0
1.6
22
Prostrate knotweed
1.5
0.6
40.0
0.1
4.4
7.6
1.5
23
Shepherd's-purse
3.5
0.4
10.0
< 0.1
0.5
0.6
1.4
24
Stork's-bill
3.7
0.3
7.1
< 0.1
0.3
0.6
1.3
25
Wild tomato
2.2
0.2
7.5
< 0.1
0.8
1.2
0.9
26
Cow cockle
1.1
0.4
35.0
< 0.1
1.8
1.8
0.8
27
Cleavers
0.8
0.4
50.0
< 0.1
3.6
3.6
0.8
28
Barnyard grass
0.8
0.2
25.0
< 0.1
6.2
6.2
0.7
29
Downy brome
1.1
0.2
15.0
< 0.1
0.6
0.6
0.5
30
Broad-leaved plantain
1.4
0.1
5.0
< 0.1
0.4
0.4
0.5
31
Barley
1.0
0.1
15.0
< 0.1
0.6
0.6
0.5
32
Goat's-beard
1.4
0.1
5.0
< 0.1
0.2
0.2
0.4
33
Wild mustard
1.4
0.1
5.0
< 0.1
0.2
0.2
0.4
34
Russian thistle
1.1
0.1
10.0
< 0.1
0.4
0.4
0.4
35
Timothy
1.0
0.1
10.0
< 0.1
0.6
0.6
0.4
36
Prickly lettuce
0.8
0.1
15.0
< 0.1
0.6
0.6
0.4
37
Wheat
1.0
< 0.1
5.0
< 0.1
0.6
0.6
0.3