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Field Survey Summary Tables – St. Mary River Irrigation District
157
Table 186. 2009 irrigated barley in St. Mary River Irrigation District (29 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Wild oats
42.8
18.5
43.3
3.9
9.1
34.6
45.7
2
Redroot pigweed
35.0
14.8
42.3
4.6
13.2
52.4
42.9
3
Wild buckwheat
55.6
13.7
24.6
1.1
2.0
17.0
33.1
4
Lamb's-quarters
33.3
10.8
32.5
3.1
9.2
35.8
32.2
5
Chickweed
5.7
3.1
55.0
4.0
69.9
139.2
21.0
6
Alfalfa
8.0
4.1
51.9
3.1
38.7
106.2
18.8
7
Kochia
34.6
6.6
19.0
0.7
2.1
5.4
18.8
8
Dandelion
28.2
6.3
22.3
0.6
2.2
7.4
16.3
9
Canola (Argentine)
12.2
7.0
56.8
1.0
8.3
19.8
14.3
10
Round-leaved mallow
25.1
2.2
8.7
0.1
0.4
0.6
9.4
11
Canada thistle
10.8
3.4
31.0
0.7
6.4
10.0
9.1
12
Quack grass
5.7
2.7
47.5
0.5
8.4
13.0
6.2
13
Green foxtail
15.3
1.0
6.7
0.2
1.0
1.6
5.8
14
Pale smartweed
10.8
0.8
7.4
0.1
0.6
1.0
4.0
15
Stinkweed
8.0
1.2
14.6
0.1
1.8
2.4
3.9
16
Annual sow-thistle
8.0
1.4
17.6
0.1
0.9
2.2
3.8
17
Prostrate knotweed
2.9
1.7
60.0
0.2
7.6
7.6
3.3
18
Stork's-bill
8.6
0.7
8.3
< 0.1
0.3
0.6
3.2
19
Cleavers
2.9
1.4
50.0
0.1
3.6
3.6
2.6
20
Barnyard grass
2.9
0.7
25.0
0.2
6.2
6.2
2.2
21
Prickly lettuce
2.9
0.4
15.0
< 0.1
0.6
0.6
1.3
22
Shepherd's-purse
2.9
0.3
10.0
< 0.1
0.4
0.4
1.1
23
Perennial sow-thistle
2.9
0.1
5.0
< 0.1
0.2
0.2
0.9
Table 187. 2009 irrigated corn in St. Mary River Irrigation District (16 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Redroot pigweed
38.1
18.3
48.0
4.4
11.6
55.8
73.6
2
Wild buckwheat
66.9
21.2
31.6
1.8
2.7
11.8
61.1
3
Lamb's-quarters
32.5
7.8
24.1
1.1
3.4
12.2
28.8
4
Round-leaved mallow
34.4
8.5
24.7
0.4
1.2
2.2
23.7
5
Green foxtail
14.3
5.8
40.7
1.2
8.6
13.0
22.3
6
Kochia
33.1
4.1
12.4
0.3
0.8
1.6
16.8
7
Alfalfa
13.1
5.6
42.5
0.6
4.6
9.0
16.0
8
Canola (Argentine)
28.2
3.7
13.0
0.2
0.8
2.6
14.7
9
Dandelion
24.2
1.9
7.7
0.1
0.4
0.8
10.0
10
Wild oats
12.5
2.9
23.4
0.2
1.3
2.8
8.5
11
Annual sow-thistle
15.3
2.3
15.0
0.1
0.8
1.4
8.3
12
Quack grass
5.1
1.0
20.0
0.1
2.6
2.6
3.9
13
Barley
6.6
1.0
15.0
< 0.1
0.6
0.6
3.4
14
Canada thistle
9.1
0.5
5.0
< 0.1
0.2
0.2
3.3
15
Field bindweed
6.6
0.7
10.0
< 0.1
0.4
0.4
2.9
16
Wheat
6.6
0.3
5.0
< 0.1
0.6
0.6
2.6