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Field Survey Summary Tables – St. Mary River Irrigation District
158
Table 188. 2009 irrigated broad-leaved annual crops in St. Mary River Irrigation District (50 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
47.7
5.4
11.4
0.3
0.6
2.0
55.7
2
Wild buckwheat
35.0
5.9
16.9
0.3
1.0
5.0
54.0
3
Round-leaved mallow
22.0
4.0
18.3
0.2
1.1
2.4
36.7
4
Wild oats
14.3
3.1
21.7
0.2
1.4
4.8
27.9
5
Canada thistle
13.4
1.8
13.5
0.1
1.0
1.8
19.4
6
Lamb's-quarters
13.1
1.5
11.8
0.1
0.8
3.8
16.5
7
Annual sow-thistle
7.8
1.8
23.0
0.1
1.4
4.8
15.4
8
Redroot pigweed
11.4
1.3
11.2
0.1
0.5
1.4
12.6
9
Downy brome
4.8
0.8
16.6
0.1
1.4
1.6
8.5
10
Wild tomato
6.1
0.4
6.9
< 0.1
0.8
1.4
6.8
11
Canola (Argentine)
1.6
0.6
40.0
0.1
4.8
4.8
6.7
12
Dandelion
3.6
0.8
22.5
< 0.1
1.3
2.6
6.7
13
Wheat
3.1
0.5
17.5
0.1
2.0
2.4
6.6
14
Foxtail barley
4.3
0.3
7.7
< 0.1
0.7
1.0
4.7
15
Cleavers
1.6
0.5
30.0
< 0.1
1.8
1.8
3.8
16
Prostrate pigweed
2.3
0.3
15.0
< 0.1
0.6
0.6
2.9
17
Barnyard grass
2.8
0.1
5.0
< 0.1
0.2
0.2
2.1
18
Chickweed
1.6
0.2
15.0
< 0.1
0.6
0.6
2.0
19
Quack grass
1.6
0.2
10.0
< 0.1
0.6
0.6
1.8
20
Stinkweed
2.3
0.1
5.0
< 0.1
0.2
0.2
1.7
21
Russian thistle
2.3
0.1
5.0
< 0.1
0.2
0.2
1.7
22
Corn
1.6
0.2
10.0
< 0.1
0.4
0.4
1.6
23
Goat's-beard
2.0
0.1
5.0
< 0.1
0.2
0.2
1.5
24
Green foxtail
1.6
0.1
5.0
< 0.1
0.6
0.6
1.5
25
Millet
1.6
0.1
5.0
< 0.1
0.2
0.2
1.2
Table 189. 2009 irrigated canola in St. Mary River Irrigation District (22 fields)
Frequency Field Uniformity
Field Density (#/m
2
)
Relative
Rank Species
(%)
All Occurrence All Occurrence High Abundance
1
Kochia
56.9
8.1
14.2
0.4
0.7
2.0
71.3
2
Wild buckwheat
26.5
6.5
24.4
0.4
1.7
5.0
53.6
3
Round-leaved mallow
26.5
5.6
21.2
0.4
1.4
2.4
48.0
4
Canada thistle
14.0
2.6
18.8
0.1
1.0
1.6
21.2
5
Wild oats
14.8
2.1
14.2
0.1
1.0
2.2
20.6
6
Annual sow-thistle
14.0
1.7
12.5
0.1
0.6
1.2
15.5
7
Redroot pigweed
10.5
1.9
18.3
0.1
0.9
1.4
15.1
8
Downy brome
6.3
1.6
25.0
0.1
1.6
1.6
12.5
9
Wild tomato
10.1
0.8
7.5
0.1
1.0
1.4
12.0
10
Lamb's-quarters
10.1
1.3
12.5
0.1
0.5
0.6
11.0
11
Foxtail barley
4.5
0.2
5.0
< 0.1
1.0
1.0
5.0
12
Barnyard grass
6.3
0.3
5.0
< 0.1
0.2
0.2
4.5
13
Stinkweed
5.1
0.3
5.0
< 0.1
0.2
0.2
3.6
14
Russian thistle
5.1
0.3
5.0
< 0.1
0.2
0.2
3.6
15
Millet
3.5
0.2
5.0
< 0.1
0.2
0.2
2.5