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Field Survey Summary Tables – Irrrigation Districts
133
Table 154. Density, species richness and weed-free quadrats in the surveyed crops in each irrigation district
Number of
Density
Species
Weed-free
fields surveyed
(number/m
2
)
(number /field)
quadrats
Crop
mean SE median
mean SE
%
SE
Bow River
101
8.2
1.3
1.6
2.6
0.3
59.7
4.9
Annual crops
83
8.3
1.6
0.1
2.7
0.3
61.8
5.3
Cereal crops
48
10.7
2.1
2.5
3.6
0.4
49.6
7.2
Spring wheat
33
8.2
2.4
1.3
2.8
0.4
58.2
8.6
Barley
10
12.8
4.0
7.7
4.0
0.5
36.4 15.2
Broad-leaved annual crops
35
5.0
2.3
0.1
1.5
0.3
78.9
6.9
Canola
13
9.4
5.5
0.0
1.1
0.5
77.9 11.5
Perennial crops
18
7.6
1.6
3.8
2.1
0.3
50.0 11.8
Alfalfa
15
8.9
1.7
7.0
2.1
0.4
44.9 12.8
Eastern
121
14.0
1.3
7.8
4.0
0.2
31.7
4.2
Annual crops
69
12.0
1.7
4.2
4.9
0.2
36.1
5.8
Cereal crops
48
13.9
2.2
7.3
5.0
0.3
32.2
6.7
Spring wheat
28
13.7
2.4
7.7
5.2
0.4
30.5
8.7
Barley
13
17.8
5.8
3.9
4.7
0.4
31.9 12.9
Broad-leaved annual crops
21
7.5
1.8
3.3
4.7
0.4
45.0 10.9
Canola
16
6.2
1.9
2.4
4.8
0.4
49.7 12.5
Perennial crops
52
16.6
2.1
11.0
2.8
0.3
25.8
6.1
Alfalfa
43
16.9
2.2
11.6
2.9
0.3
23.0
6.4
Lethbridge Northern
79
17.6
3.4
7.5
3.8
0.3
39.6
5.5
Annual crops
66
17.4
3.8
7.3
4.2
0.3
38.0
6.0
Cereal crops
59
18.8
4.2
7.9
4.4
0.3
35.7
6.2
Spring wheat
18
14.4
3.8
9.5
4.0
0.5
29.4 10.7
Barley
33
22.1
7.0
7.7
4.5
0.4
37.9
8.4
Perennial crops
13
19.1
7.5
4.1
1.8
0.2
48.4 13.9
Raymond & Magrath
22
6.0
1.8
3.4
3.1
0.5
50.4 10.7
Annual crops
15
5.0
2.6
0.3
3.2
0.7
63.8 12.4
Cereal crops
12
5.3
3.2
2.0
2.6
0.7
68.6 13.4
St. Mary River
179
15.1
2.3
3.3
3.4
0.2
51.7
3.7
Annual crops
155
12.1
2.4
2.3
3.3
0.2
55.2
4.0
Cereal crops
105
17.1
3.4
4.4
4.0
0.2
45.0
4.9
Spring wheat
60
15.4
3.7
3.8
4.2
0.3
49.0
6.5
Barley
29
24.4
9.4
6.7
3.6
0.5
39.2
9.1
Corn
16
10.7
3.6
5.1
3.5
0.3
39.8 12.2
Broad-leaved annual crops
50
1.9
0.4
1.2
2.1
0.2
76.1
6.0
Canola
22
2.0
0.4
1.8
2.1
0.3
72.0
9.6
Dry beans
11
2.5
1.7
1.1
1.8
0.6
78.4 12.4
Potatoes
10
0.9
0.2
0.8
2.2
0.3
82.9 11.9
Perennial crops
24
32.1
7.0
21.8
3.6
0.7
32.0
9.5
Alfalfa
16
39.2
9.4
25.1
4.2
0.9
27.4 11.2
Taber
41
5.9
1.0
3.0
2.3
0.2
63.7
7.5
Annual crops
31
6.3
1.3
2.4
2.1
0.3
65.8
8.5
Cereal crops
20
8.7
1.7
5.1
2.7
0.2
53.8 11.1
Broad-leaved annual crops
11
2.0
1.1
0.0
1.0
0.4
87.7
9.9
Perennial crops
10
4.4
1.0
2.2
3.1
0.5
57.0 15.7
United, Leavitt, Aetna & Mountain View 15
9.3
1.9
6.1
3.3
0.5
37.0 12.5
Western Irrigation District
13
16.5
6.2
4.7
3.6
0.7
41.1 13.6
Annual crops
10
10.1
3.4
11.7
3.5
0.6
47.9 15.8