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

2. AGVISE Laboratories % Zone or Grid Samples Tested Compared to Conventional Whole Field Composite Samples in 2012

3. AGVISE Laboratories %Zone or Grid Samples – Northwood laboratory 1997 - 2012 % Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested

4. 43 44 47 50 51 33 47 48 44 43 50 4142 64 Average Soil Nitrate following Wheat in 2012 Fall 2012 Samples (lb/a 0-24 samples) MB ND SD MN 42 39 38 65 44 48 43 67 57

5. Soil Nitrate Variability Between Fields Following WHEAT in 2012

6. Average Soil Nitrate Following WHEAT 1986-2012 26 Years of history! 86 88 90 92 94 96 98 00 02 04 06 08 10 11 2012 64 59 107 96 81 68 42 38 50 46 48 60 56 44 54 53 61 Nitrate-N (0-24) 43 35 46 60 35 41 29 32 40 45

7. Average Soil Nitrate Following Wheat For Region (1986-2012) Deep N (24-48 lb/a) 86 88 90 92 94 96 98 00 02 04 06 08 10 12 51 43 41 49 53 63 59 44 46 35 29 36 34 32 29 31 29 Nitrate-N (24-48 lb/a) 18 27 20 18 19 13 14 15 14

8. Soil Nitrate Variability Between Fields Following Barley in 2012

9. Average Soil Nitrate Following BARLEY 1986-2012 86 88 90 92 94 96 98 00 02 04 06 08 10 12 52 53 95 84 70 56 35 29 39 37 39 47 53 40 45 48 50 Nitrate-N (0-24 lb/a) 41 30 43 45 35 29 27 34 38

10. Soil Nitrate Variability Between Fields Following Sunflower in 2012

11. Average Soil Nitrate Following SUNFLOWER 1986- 2012 86 88 90 92 94 96 98 00 02 04 06 08 10 12 46 50 82 101 70 55 43 40 43 47 44 47 49 44 50 48 50 Nitrate-N (0-24 lb/a) 48 32 34 50 30 33 25 22 27 39

12. Soil Nitrate Variability Between Fields Following Dry Beans 2012

13. Average Soil Nitrate Following DRY BEANS 1986-2012 86 88 90 92 94 96 98 00 02 04 06 08 10 12 53 58 78 102 100 65 61 51 65 52 57 61 72 49 70 53 55 Nitrate-N (0-24 lb/a) 58 46 66 44 41 34 35 38 39

14. Soil Nitrate Variability Between Fields Following Sugarbeet in 2012

15. Average Soil Nitrate Following SUGARBEET 1986- 2012 86 88 90 92 94 96 98 00 02 04 06 08 10 12 25 21 48 47 53 30 22 16 19 18 25 20 25 20 23 25 22 Nitrate-N (0-24 lb/a) 21 16 21 22 17 13 15 17 20

16. Soil Nitrate Variability Between Fields Following Fallow in 2012

17. Average Soil Nitrate Following FALLOW 1986-2012 86 88 90 92 94 96 98 00 02 04 06 08 10 12 102 119 143 149 128 98 80 48 58 60 67 69 79 84 81 93 85 Nitrate-N (0-24 lb/a) 79 75 66 62 59 50 60 46 55 46

18. Soil Nitrate Variability Between Fields Following Soybeans in 2012

19. Average Soil Nitrate Following Soybeans 1995- 2012 95 97 99 01 03 05 07 09 11 2012 29 30 33 30 28 31 30 Nitrate-N (0-24 lb/a) 32 35 29 27 35 26 21 24 23 27 23

20. 52 46 54 68 57 54 67 44 77 64 63 113 Average Soil Nitrate following Corn in 2012 Fall 2012 samples (lb/a 0-24 samples) MB ND SD MN 56 83 63 62 89 50 85 114

21. Soil Nitrate Variability Between Fields Following Corn in 2012

22. 56% 55% 66% 47% 68% 57% 78% 77% 69% 72% 34% 14% 20% 58% 50% 27% 60% % Soil Samples with Phosphorus less than 10 ppm Fall 2012 samples (0-6 samples) MB ND SD MN 38% (Olsen P test) 35% 67% 32% 36% 50% 46% 60% 57%47% 71% 36%

23. 21% 14% 3% 6% 7% 2% 48% 36% 17% 30% 32% 38% 11% 6% % Soil Samples with Potassium less than 150 ppm Fall 2012 samples (0-6 samples) MB ND SD MN 32% 11% 48% 21% 5% 35% 41% 31% 23% 4%1% 78% 77% 19%

24. 65% 56% 72% 54% 77% 86% 83% 65% 78% 35% 24% 35% 32% 59% 53% 49% 66% % Soil Samples with Zinc less than 1.0 ppm Fall 2012 samples (0-6 samples) MB ND SD MN 34% 35% 26% 59% 20% 36% 50% 49% 74% 91% 22% 44% 65%

25. 8% 14% 18% 49% 40% 54% 22% 21% 9% 12% 10% 5% 9% 7% 11% 15% 12% % Soil Samples with Sulfur less than 15 lb/a Fall 2012 samples (0-6 samples) MB ND SD MN 10% 46% 49% 69% 27% 38% 32% 44% 29% 19% 20% 59% 67%

26. 26% 22% 33% 25% 38% 60% 71% 43% 28% 21% 25% 17% 33% 8% 20% 29% % Soil Samples with %OM less than 3.0% Fall 2012 Samples (0-6 samples) MB ND SD MN 9% 3% 9% 75% 26% 17% 9% 28% 26% 55% 12% 26% 13%

27. 48% 38% 56% 59% 87% 85% 89% 65% 84% 41% 20% 77% 70% 57% 44% 30% 47% 13% 78% 55% 42% 59% % Soil Samples with Chloride less than 40 lb/a Fall 2012 Samples (0-24 samples) MB ND SD MN 51% 78% 85% 34% 57% 63%

28. 12% 17% 7% 13% 10% 2% 1% 4% 20% 29% 26% 5% 0% 2% 5% 16% 14% 26% 24% 10% 12% % Soil Samples with Copper less than 0.5 ppm Fall 2012 samples (0-6 samples) MB ND SD MN 15% 7% 10% 5% 14% 45% 41% 4%

29. 3% 7% 5% 2% 15% 2% 39% 5% 1% 13% 4% 1% 8% 2% % Soil Samples with Boron less than 0.4 ppm Fall 2012 samples (0-6 samples) MB ND SD MN 1% 9% 47% 75% 17% 9%8% 12% 9% 35% 27% 4% 0%

30. 65% 76% 70% 38% 35% 39% 62% 51% 25% 54% 79% 96% 43% 36% 22% 23% 75% 72% 74% 82% 42% 71% % Soil Samples with Soil pH greater than 7.3 Fall 2012 samples (0-6 samples) MB ND SD MN 65% 27% 34% 23% 15% 6% 67% 92% 84%

31. 12% 26% 10% 6% 7% 10% 29% 23% 44% 4% 9% 2% 17% 40% 22% 14% 10% % Soil Samples with Carbonate greater than 5.0% Fall 2012 samples (0-6 samples) MB ND SD MN 36% 1% 10% 24% 55% 13% 3% 1% 3% 9% 6%

32. 27% 37% 15% 10% 1% 4% 2% 8% 1% 4% 19% 3% 11% 2% 21% 17% 12% 23% 17% 8% 10% % Soil Samples with Salts greater than 1.0 Fall 2012 Samples (0-6 samples) MB ND SD MN 11% 12% 7% 6% 2% 0% 6% 17% 21%

33. North Dakota & NW Minnesota % Samples Testing with Salts greater than 1.0 1:1 salt method – expressed as mmhos/cm 582 Grand Forks 567 TRF 587 Minot

34. South Dakota - % Samples Testing with Salts greater than 1.0 1:1 salt method – expressed as mmhos/cm 572 – Watertown 573 – Huron 574 – Aberdeen 583 – Grand Forks

35. 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