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

Explore the trends in precision soil testing for various crops in Canada, evaluating soil nitrate levels and variability between fields from 1986 to 2014. This study includes comparisons of zone/grid samples versus conventional methods for different crops, showcasing nutrient levels and soil characteristics data.

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

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

  2. %Zone or Grid Samples Tested Compared to Conventional Whole Field Composite Samples in 2014

  3. %Zone or Grid Samples – Northwood laboratory1997 - 2014 % Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested

  4. Average Soil Nitrate following Wheat in 2014 MB Fall 2014 Samples 31 (lb/a 0-24” samples) 35 33 39 21 39 36 41 35 33 32 37 30 ND 33 32 27 24 32 26 39 MN 34 37 SD 51 32

  5. Average Soil Nitrate Following “Wheat” in Canada1986 - 2014 Nitrate-N (0-24” lb/a)

  6. Soil Nitrate Variability Between Fields Following “Wheat” in Canada – 2014

  7. Average Soil Nitrate following Canola in 2014 MB Fall 2013 Samples 27 (lb/a 0-24” samples) 43 30 40 22 39 40 46 36 31 38 ND 23 25 MN SD

  8. Average Soil Nitrate Following “Canola”1986 - 2014 Nitrate-N (0-24” lb/a)

  9. Soil Nitrate Variability Between Fields Following “Canola” in Canada – 2014

  10. Average Soil Nitrate Following “Barley” in Canada1986 - 2014 Nitrate-N (0-24” lb/a)

  11. Soil Nitrate Variability Between Fields Following “Barley” in Canada - 2014

  12. Average Soil Nitrate Following “Flax” in Canada1988 - 2013 Nitrate-N (0-24” lb/a)

  13. Soil Nitrate Variability Between Fields Following “Potato” in Canada - 2014

  14. Average Soil Nitrate Following “Potato” in Canada1986 - 2014 Nitrate-N (0-24” lb/a)

  15. Average Soil Nitrate following Corn in 2014 Fall 2014 samples MB (lb/a 0-24” samples) 45 60 65 35 39 40 37 ND 41 38 37 31 37 44 28 MN 62 44 SD 58 46 87

  16. Average Soil Nitrate Following “Corn” in Canada1988 - 2014 Nitrate-N (0-24” lb/a)

  17. Soil Nitrate Variability Between Fields Following “Corn” in Canada - 2014

  18. Average Soil Nitrate following Soybean in 2014 Fall 2014 samples MB 24 (lb/a 0-24” samples) 30 30 26 33 37 25 21 27 24 29 ND 24 19 23 24 19 20 25 MN 23 25 SD 38 17 46 33

  19. Average Soil Nitrate Following “Soybean” in Canada2008 - 2014 Nitrate-N (0-24” lb/a)

  20. Soil Nitrate Variability Between Fields Following “Soybean” in Canada 2014

  21. % Soil Samples with Phosphorus less than 10 ppm Fall 2014 samples MB 38% (0-6” samples) 40% (Olsen P test) 45% 50% 17% 76% 46% 24% 32% 72% 72% 72% 53% 60% 67% ND 46% 57% 58% 50% 66% 37% 63% MN 40% 47% 36% SD 22% 38% 46% 32% 31%

  22. % Soil Samples with Potassium less than 150 ppm MB Fall 2014 samples 37% 16% (0-6” samples) 36% 33% 36% 12% 17% 27% 18% 3% 5% 2% 15% 72% 33% ND 6% 21% 68% 7% 43% 6% 45% 1% 5% 22% MN 31% SD 50% 1% 3% 25% 35%

  23. % Soil Samples with Zinc less than 1.0 ppm MB Fall 2014 samples 44% 58% (0-6” samples) 51% 56% 28% 80% 47% 34% 33% 74% 87% 81% 50% 63% 41% ND 47% 71% 28% 81% 51 61% 18% 84% 46% MN 47% 31% SD 34% 60% 45% 36% 26%

  24. % Soil Samples with Sulfur less than 15 lb/a MB Fall 2014 samples 10% 20% (0-6” samples) 18% 12% 8% 31% 33% 17% 16% 57% 18% 29% 13% 44% 22% ND 33% 65% 20% 49% 34% 67% 68% 47% MN 81% 36% 59% SD 69% 84% 73% 39% 57%

  25. % Soil Samples with %OM less than 3.0% MB Fall 2014 Samples 8% 12 (0-6” samples) 27% 12% 35% 28% 36% 22% 26% 60% 33% 44% 21% 20% 36% ND 23% 58% 77% 26% 28% 34% 27% 49% MN 28% 11% 12% SD 17% 31% 5% 26% 7%

  26. % Soil Samples with Chloride less than 40 lb/a MB Fall 2014 Samples 46% (0-24” samples) 41% 57% 51% 25% 77% 65% 36% 30% 86% 55% 72% 37% 38% 76% ND 69% 88% 52% 50% 89% 90% 89% 52% MN 67% 86% SD 62% 81% 70%

  27. % Soil Samples with Copper less than 0.5 ppm MB Fall 2014 samples 18% 3% (0-6” samples) 27% 9% 31% 17% 13% 17% 16% 3% 16% 3% 19% 32% 46% ND 9% 43% 11% 27% 16% 12% 23% 10% 4% MN 5% 5% SD 4% 2% 5% 1%

  28. % Soil Samples with Boron less than 0.4 ppm MB Fall 2014 samples 1% (0-6” samples) 1% 3% 0% 6% 1% 11% 11% 1% 3% 3% 8% 6% 26% 5% ND 5% 20% 40% 91% 4% 13% 44% 7% 11% 14% MN 8% SD 6% 25% 9% 44% 23%

  29. % Soil Samples with Soil pH greater than 7.3 MB Fall 2014 samples 64% 94% (0-6” samples) 72% 73% 87% 79% 57% 79% 76% 61% 73% 52% 78% 55% 96% ND 35% 7% 65% 44% 77% 31% 44% 9% 22% MN 38% 57% SD 22% 28% 22% 26% 22%

  30. % Soil Samples with Soil pH less than 6.0 MB Fall 2014 samples 6% 0% (0-6” samples) 4% 6% 2% 1% 25% 1% 3% 4% 2% 6% 3% 12% 1% ND 20% 41% 4% 15% 4% 16% 14% 28% 16% MN 25% 10% 16% SD 22% 34% 13% 18% 39%

  31. % Soil Samples with Carbonate greater than 5.0% MB Fall 2014 samples 16% (0-6” samples) 56% 23% 12% 22% 9% 10% 44% 10% 4% 14% 6% 24% 26% 3% ND 5% 5% 10% 26% 8% 3% 8% 1% MN 8% 31% SD 4% 8% 1% 3%

  32. % Soil Samples with Salts greater than 1.0 MB Fall 2014 Samples 9% 10% (0-6” samples) 15% 16% 14% 8% 5% 17% 13% 2% 17% 6% 32% 13% 5% ND 8% 2% 1% 21% 10% 3% 2% 17% MN 8% 4% SD 0% 1% 3% 11% 3%

  33. Manitoba - % Samples Testing with Salts greater than 1.0 582 NE ND R0G R0K 1:1 salt method – expressed as mmhos/cm

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