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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. % Zone or Grid Samples Tested Compared to Conventional Whole Field Composite Samples in 2015. AGVISE Laboratories %Zone or Grid Samples – Northwood laboratory 1997 - 2015.

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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 2015

  3. AGVISE Laboratories%Zone or Grid Samples – Northwood laboratory1997 - 2015 % Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested

  4. Average Soil Nitrate following Wheat in 2015 Fall 2015 samples (lb/a 0-24” samples) 41 44 54 42 58

  5. Soil Nitrate Variability Between Fields Following “WHEAT” in Montana - 2015

  6. Average Soil Nitrate following Wheat in 2015 MB Fall 2015 Samples 52 (lb/a 0-24” samples) 42 49 52 24 49 46 43 38 37 36 43 43 ND 35 34 36 38 33 29 47 MN 41 48 SD 41 55

  7. Average Soil Nitrate following “Fallow” in 2015 Fall 2015 samples (lb/a 0-24” samples) 62 59 53 52 45

  8. Soil Nitrate Variability Between Fields Following “Fallow” in Montana - 2015

  9. % Soil Samples with Phosphorus less than 10 ppm Fall 2015 samples (0-6”) (Olsen P test) 35% 56% 36% 56% 39% 37%

  10. % Soil Samples with Potassium less than 150 ppm Fall 2015 samples (0-6”) 2% 4% 2% 15% 10% 4%

  11. % Soil Samples with Zinc less than 1.0 ppm Fall 2015 samples (0-6”) 87% 80% 79% 54% 50% 50%

  12. % Soil Samples with Sulfur less than 15 lb/a Fall 2015 samples (0-6”) 60% 53% 53% 39% 24% 52%

  13. % Soil Samples with Copper less than 0.5 ppm Fall 2015 samples (0-6”) 1% 5% 3% 4% 1% 2%

  14. % Soil Samples with Boron less than 0.4 ppm Fall 2015 samples (0-6”) 24% 9% 10% % 2% 8%

  15. % Soil Samples with Chloride less than 40 lb/a Fall 2015 samples (0-6”) 76% 70% 76% 50% 52% 63%

  16. % Soil Samples with Carbonate greater than 5.0% Fall 2015 samples (0-6”) 2% 17% 20% 9% 8% 55%

  17. % Soil Samples with Salts greater than 1.0 mmhos/cm Fall 2015 samples (0-6”) 3% 3% 4% 4% 5% 5%

  18. % Soil Samples with soil pH greater than 7.3 Fall 2015 samples (0-6”) 65% 76% 72% 84% 90% 63%

  19. % Soil Samples with soil pH less than 6.0 Fall 2015 samples (0-6”) 3% 1% 1% 1% 0% 14%

  20. % Soil Samples with %OM less than 3.0% Fall 2015 samples (0-6”) 94% 78% 71% 82% 80% 42%

  21. Zip codes for Montana 599 595 592 594 598 596 593 590-591 597

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