Trend for Precision Soil Testing % Zone or Grid Samples Tested compared to Total Samples.
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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 % Zone orG rid Sam ples Overall MN SD ND MT MB
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AGVISE Laboratories %Zone or Grid Samples – Northwood laboratory % Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested
Transcript of Trend for Precision Soil Testing % Zone or Grid Samples Tested compared to Total Samples.
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
% Z
one
or G
rid S
ampl
es
Overall MN SD ND MT MB
%Zone or Grid Samples Tested Compared to Conventional Whole Field Composite Samples in 2015
79%
34%
71%
21%
34%
63%
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 - 2015
22%18%
14%15%11%
8%11%
15%11%
15% 16%
26%28%31% 33%
39%40%39% 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
% Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested
Fall 2015 samples
44
42
41
Average Soil Nitrate following Wheat in 2015
(lb/a 0-24” samples)
58
54
22%
35%
19%
10%
6%
8%
0% 10% 20% 30% 40% 50% 60%
0-20
21-40
41-60
61-80
81-100
>100
Nitr
ate
Cat
egor
y To
tal N
itrat
e 0-
24"
lb/a
% of Fields Testing in Each Category
Soil Nitrate Variability Between Fields Following “WHEAT” in Montana - 2015
36
4337
353334
38 36
38
43
55
41
46 4349
Average Soil Nitrate following Wheat in 2015
Fall 2015 Samples
(lb/a 0-24” samples)
MB
ND
SDMN29
41
2452
52 42
49
4847
Fall 2015 samples
59
52
62
Average Soil Nitrate following “Fallow” in 2015
(lb/a 0-24” samples)
45
53
7%
27%
32%
18%
9%
7%
0% 10% 20% 30% 40% 50% 60%
0-20
21-40
41-60
61-80
81-100
>100
Nitr
ate
Cat
egor
y To
tal N
itrat
e 0-
24"
lb/a
% of Fields Testing in Each Category
Soil Nitrate Variability Between Fields Following “Fallow” in Montana - 2015
% Soil Samples with Phosphorus less than 10 ppm
Fall 2015 samples (0-6”)
56%
56%
36%
35%
39%
(Olsen P test)
37%
% Soil Samples with Potassium less than 150 ppm
Fall 2015 samples (0-6”)
4%
15%
2%
2%
10%4%
% Soil Samples with Zinc less than 1.0 ppm
Fall 2015 samples (0-6”)
80%
54%
79%
87%
50%50%
% Soil Samples with Sulfur less than 15 lb/a
Fall 2015 samples (0-6”)
53%
39%
53%
60%
24%52%
% Soil Samples with Copper less than 0.5 ppm
Fall 2015 samples (0-6”)
5%
4%
3%
1%
1%2%
% Soil Samples with Boron less than 0.4 ppm
Fall 2015 samples (0-6”)
9%
%
10%
24%
2%8%
% Soil Samples with Chloride less than 40 lb/a
Fall 2015 samples (0-6”)
70%
50%
76%
76%
52%63%
% Soil Samples with Carbonate greater than 5.0%
Fall 2015 samples (0-6”)
17%
9%
20%
8%55%
2%
% Soil Samples with Salts greater than 1.0 mmhos/cm
Fall 2015 samples (0-6”)
3%
4%
4%
3%
5%5%
% Soil Samples with soil pH greater than 7.3
Fall 2015 samples (0-6”)
76%
84%
72%
65%
90%63%
% Soil Samples with soil pH less than 6.0
Fall 2015 samples (0-6”)
1%
1%
1%
3%
0%14%
% Soil Samples with %OM less than 3.0%
Fall 2015 samples (0-6”)
78%
82%
71%
94%
80%42%
592
593
594
595
Zip codes for Montana
590-591
599
598
597
596
