Trend for Precision Soil Testing % Zone or Grid Samples Tested compared to Total Samples

1
Trend for Precision Soil Testing Zone or Grid
Samples Tested compared to Total Samples
2
AGVISE LaboratoriesZone or Grid Samples Tested
Compared to Conventional Whole Field Composite
Samples in 2012
3
AGVISE LaboratoriesZone or Grid Samples
Northwood laboratory1997 - 2012
Grid or Zone Samples Tested Compared To
Conventional Whole Field Composite Samples Tested
4
Average Soil Nitrate following Wheat in 2012
MB
Fall 2012 Samples
44
(lb/a 0-24 samples)
48
43
65
38
64
41
42
33
47
47
44
44
ND
50
51
43
48
50
42
MN
57
50
67
SD
39
43
5
Average Soil Nitrate Following WHEAT in Canada
1986-2012
107
96
81
68
64
59
58
56
Nitrate-N (0-24) lb/a
52
50
50
50
50
49
49
47
46
42
42
41
40
39
39
38
35
34
34
86 88 90 92 94 96 98
00 02 04 06 08 10
12
6
Soil Nitrate Variability Between Fields
Following Wheat in Canada - 2012
7
Average Soil Nitrate following Canola in 2012
MB
Fall 2012 Samples
43
(lb/a 0-24 samples)
63
54
72
47
74
50
75
49
46
40
ND
48
41
MN
SD
8
Soil Nitrate Variability Between Fields
Following Canola in Canada 2012
9
Average Soil Nitrate Following Canola in
Canada 1988-2012
82
75
60
60
58
57
57
54
53
51
49
45
44
44
43
Nitrate-N (0-24) lb/a
40
40
37
36
36
35
34
32
32
29
88 90 92 94 96 98
00 02 04 06 08 10
12
10
Soil Nitrate Variability Between Fields
Following Barley in Canada - 2012
11
Average Soil Nitrate Following BARLEY in Canada
1986-2012
81
70
66
64
64
60
58
58
58
55
54
53
50
50
49
49
47
Nitrate-N (0-24) lb/a
46
45
44
43
39
38
37
37
36
35
86 88 90 92 94 96 98
00 02 04 06 08 10
12
12
Soil Nitrate Variability Between Fields
Following Flax in Canada - 2012
13
Average Soil Nitrate Following FLAX in Canada
1988-2012
89
87
64
60
58
56
55
Nitrate-N (0-24)
51
48
47
45
42
42
40
39
38
38
37
38
34
34
32
31
29
24
88 90 92 94 96 98 00
02 04 06 08 10 12
14
Soil Nitrate Variability Between Fields
Following Potato in Canada - 2012
15
Average Soil Nitrate Following POTATO in
Canada 1988-2012
106
96
93
92
81
81
79
74
73
72
72
70
69
68
67
Nitrate-N (0-24)
62
61
55
54
54
51
50
46
34
39
88 90 92 94 96 98 00
02 04 06 08 10 2011
16
Average Soil Nitrate following Corn in 2012
Fall 2012 samples
MB
(lb/a 0-24 samples)
89
63
113
54
67
46
50
ND
68
54
52
44
57
63
64
MN
77
56
SD
83
85
62
114
17
Soil Nitrate Variability Between Fields
Following Corn in Canada - 2012
18
Average Soil Nitrate Following CORN in Canada
1988-2012
117
106
96
93
90
84
85
85
80
77
Nitrate-N (0-24)
71
65
65
64
64
63
60
59
58
55
54
54
54
45
42
88 90 92 94 96 98 00
02 04 06 08 10 12
19
Soil Nitrate Variability Between Fields
Following Soybean in Canada 2012
20
Average Soil Nitrate Following Soybeans in
Canada
2008 2009 2010 2011 2012
607 827 865 1350 1579
of Fields Tested
21
Soil Samples with Phosphorus less than 10 ppm
Fall 2012 samples
MB
(0-6 samples)
38
35
(Olsen P test)
50
58
20
60
27
14
34
66
78
77
55
67
72
ND
47
57
69
56
68
36
71
MN
57
47
36
SD
36
46
60
32
50
22
Soil Samples with Potassium less than 150 ppm
MB
Fall 2012 samples
32
11
(0-6 samples)
38
32
19
6
11
30
17
3
2
2
14
77
36
ND
5
21
78
7
48
6
48
4
1
MN
23
31
SD
41
3
21
35
1
23
Soil Samples with Zinc less than 1.0 ppm
MB
Fall 2012 samples
35
59
(0-6 samples)
53
65
32
66
49
24
35
72
83
56
78
44
ND
54
77
22
86
65
65
20
50
91
MN
59
35
SD
26
74
36
49
34
24
Soil Samples with Sulfur less than 15 lb/a
MB
Fall 2012 samples
10
7
(0-6 samples)
11
5
9
12
15
9
12
14
54
22
8
32
9
ND
18
38
40
21
10
49
46
MN
29
20
67
49
SD
27
69
44
19
59
25
Soil Samples with OM less than 3.0
MB
Fall 2012 Samples
9
8
(0-6 samples)
20
13
33
29
29
17
25
33
71
43
22
21
26
ND
25
60
75
26
28
38
26
55
MN
28
12
9
SD
17
3
28
9
26
26
Soil Samples with Chloride less than 40 lb/a
MB
Fall 2012 Samples
51
(0-24 samples)
34
55
78
13
59
42
47
30
56
89
65
38
20
63
ND
59
85
41
48
87
77
44
MN
85
70
84
SD
57
78
57
27
Soil Samples with Copper less than 0.5 ppm
MB
Fall 2012 samples
15
7
(0-6 samples)
24
4
26
12
10
14
16
17
2
2
12
29
41
ND
7
45
10
20
13
10
26
5
MN
14
5
4
SD
2
1
5
0
28
Soil Samples with Boron less than 0.4 ppm
MB
Fall 2012 samples
1
(0-6 samples)
0
1
0
4
2
8
13
1
5
2
4
7
17
5
ND
2
15
39
75
3
15
47
MN
9
8
9
SD
8
27
9
35
12
29
Soil Samples with Soil pH greater than 7.3
MB
Fall 2012 samples
65
92
(0-6 samples)
82
74
84
71
42
72
75
70
62
51
76
67
96
ND
38
6
65
39
79
35
43
15
23
MN
36
54
SD
34
25
23
27
22
30
Soil Samples with Carbonate greater than 5.0
MB
Fall 2012 samples
36
(0-6 samples)
55
22
22
24
10
14
40
17
10
7
13
26
44
9
ND
6
3
12
23
6
4
1
2
MN
9
29
SD
6
1
10
3
10
31
Soil Samples with Salts greater than 1.0
MB
Fall 2012 Samples
11
17
(0-6 samples)
17
23
21
10
8
12
17
15
2
8
37
19
6
ND
10
4
0
1
27
19
3
2
21
MN
11
4
SD
7
1
6
12
2
32
Manitoba - Samples Testing with Salts greater
than 1.0
582 NE ND
R0G
R0K
11 salt method expressed as mmhos/cm
33
The Salt Problem may be Worse than this?

• Composite samples
• Avoid areas that dont represent most of the
  field
• Saline areas
• Sandy ridges
• Many salty fields dont get tested
• Zone sampling
• The salty zones often do not get tested or
  fertilized