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Trend for Precision Soil Testing% Zone or Grid Samples Tested compared to
Total Samples
0%10%20%30%40%50%60%70%80%90%100%
2008 2009 2010 2011 2012 2013 2014 2015 2016
% Z
on
e o
r G
rid
Sam
ple
s
Overall MN SD ND MT MB
%Zone or Grid Samples Tested Compared to
Conventional Whole Field Composite Samples in 2016
81%
38%
74%
27%
38%
65%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
MN ND SD MT MB Overall
AGVISE Laboratories%Zone or Grid Samples – Northwood laboratory
1997 - 2016
22%18%
14%15%11%
8%11%
15%11%
15%16%
26%28%
31%33%
39%40%39%41%41%
0%
10%
20%
30%
40%
50%
60%
70%
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
% Grid or Zone Samples Tested Compared To
Conventional Whole Field Composite Samples Tested
Fall 2016 samples
34
49
36
Average Soil Nitrate following Wheat in 2016
(lb/a 0-24” samples)
29
52
42%
29%
14%
6%
4%
5%
0% 10% 20% 30% 40% 50% 60%
0-20
21-40
41-60
61-80
81-100
>100
Nit
rate
Cate
go
ry
To
tal
Nit
rate
0-2
4"
lb/a
% of Fields Testing in Each Category
Soil Nitrate Variability Between Fields
Following “WHEAT” in Montana - 2016
41
3638
4345
60
30 34
45
36
50
44
39 4345
Average Soil Nitrate following Wheat in 2016
Fall 2016 Samples
(lb/a 0-24” samples)
MB
ND
SDMN49
43
19
45
37 36
37
4255
32
Fall 2016 samples
51
52
52
Average Soil Nitrate following “Fallow” in 2016
(lb/a 0-24” samples)
44
52
9%
30%
34%
16%
6%
5%
0% 10% 20% 30% 40% 50% 60%
0-20
21-40
41-60
61-80
81-100
>100
Nit
rate
Cate
go
ry
To
tal
Nit
rate
0-2
4"
lb/a
% of Fields Testing in Each Category
Soil Nitrate Variability Between Fields
Following “Fallow” in Montana - 2016
% Soil Samples with Phosphorus less than 10 ppm
Fall 2016 samples (0-6”)
56%
53%
31%
39%
46%
(Olsen P test)
36%
% Soil Samples with Potassium less than 150 ppm
Fall 2016 samples (0-6”)
6%
13%
1%
2%
17%8%
19%
13%4%
5%
5%5%
5% 1%
41%
36%
10% 26%
26%26%
13%6%
% Soil Samples with Potassium less than 150 ppm
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
25%13%
46%
35%
8%
43%43%
33%32%5%2%
1%
59%
72%
21%
% Soil Samples with Zinc less than 1.0 ppm
Fall 2016 samples (0-6”)
80%
58%
79%
84%
51%55%
58%
41%73%
49%70%77%
82%
53
65%
31% 33%
47%
26%
58%
62%
44%76%
% Soil Samples with Zinc less than 1.0 ppm
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
26%
27%
44%
51%19%
38%
44%
43%57%
75%
21%
34%
52%
81%
% Soil Samples with Sulfur less than 15 lb/a
Fall 2016 samples (0-6”)
54%
34%
51%
59%
26%54%
13%21%
32%
52%40%
49% 27%
43%
21%
16% 16%
16%
9%
23%
16%
25%20%
% Soil Samples with Sulfur less than 15 lb/a
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
21%
80%
65%
88%90%
76%
52%
68%
49%
44%
34%
68%
67%
% Soil Samples with Copper less than 0.5 ppm
Fall 2016 samples (0-6”)
5%
9%
1%
1%
4%
3%
23%15%
11%
15%10%
6% 3%
4%
10%
30%
36%
34%
6%
1%6%
7%
16% 22%
31%28%
18%17%
% Soil Samples with Copper less than 0.5 ppm
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
12% 7%
14%
6%
16%
56%
36%
5%
% Soil Samples with Boron less than 0.4 ppm
Fall 2016 samples (0-6”)
6%
11%
5%
15%
5%22%
4%
7%3%
4%
11%17%
2%
34%
8%
2% 11%
6%3%
9%2%
% Soil Samples with Boron less than 0.4 ppm
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
2%
14%
57%
84%
27%
9%13%
10%37%9% 11% 36%
4%
1%
1%
16%
% Soil Samples with Chloride less than 40 lb/a
Fall 2016 samples (0-6”)
70%
50%
75%
80%
48%80%
54%
67%61%
64%
86%85%
84% 69%
86%
59%
45%
92%
62%
61%
52%
37% 41%
24% 63%42%
55%80%
% Soil Samples with Chloride less than 40 lb/a
Fall 2016 Samples
(0-24” samples)
MB
ND
SDMN
44%
83%
90%
39%
75%
75%
% Soil Samples with Carbonate greater than 5.0%
Fall 2016 samples (0-6”)
14%
18%
20%
10%58%
2%
11%
17%11%
9%
4%
4%
10%
26%
26%
24%
10%
12%1%
8% 33%
22%25%
14%2%
% Soil Samples with Carbonate greater than 5.0%
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
30%
4%1%
19%
56%
7%
11%
0%
2%
5%
% Soil Samples with Salts greater than 1.0 mmhos/cm
Fall 2016 samples (0-6”)
3%
5%
3%
6%
9%2%
19%
24%15%
12%3%4%
3% 8%
1%
3%
7%
11%
2%
8%
2%
19%
12% 20%
19%13%
4%8%
% Soil Samples with Salts greater than 1.0
Fall 2016 Samples
(0-6” samples)
MB
ND
SDMN
9%1%
2%
3%
6%
18%
20%
% Soil Samples with soil pH greater than 7.3
Fall 2016 samples (0-6”)
82%
83%
68%
70%
88%60%
64%
73%75%
43%
27%43%
72% 54%
30%
55%
78%
96%
47%
40%
21%
17%
73% 78%
72%79%
57%69%
% Soil Samples with Soil pH greater than 7.3
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
62%
28%43%
16%
11%
8%
45%
94%
91%
% Soil Samples with soil pH less than 6.0
Fall 2016 samples (0-6”)
2%
5%
5%
3%
1%6%
3%
6%1%
14%
13%16%
2% 4%
35%
19%
4%
1%
16%
9%
43%
16%
1% 7%
4%4%
15%1%
% Soil Samples with Soil pH less than 6.0
Fall 2016 samples
(0-6” samples)
MB
ND
SDMN
2%
10%16%
18%
17%
34%
11%
0%
0%
13%
% Soil Samples with %OM less than 3.0%
Fall 2016 samples (0-6”)
76%
76%
73%
92%
80%48%
29%
26%33%
30%
35%60%
71% 45%
27%
28%
24% 25%
34%
10%
21%
34%22%
% Soil Samples with %OM less than 3.0%
Fall 2016 Samples
(0-6” samples)
MB
ND
SDMN
8%
4%
10%
76%
37%
9%7%29%
28%
25%
55% 13%25%
11%
592
593
594
595
Zip codes for Montana
590-591
599
598
597
596
