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Soil Nutrient Variability in Montana Fields: 2011 AGVISE Laboratories Report

This report analyzes soil nutrient levels following wheat and fallow crops across Montana based on AGVISE Laboratories data from 1997 to 2011. It provides insights into soil nitrate, phosphorus, potassium, zinc, sulfur, copper, boron, chloride, carbonate, salts, soil pH, and organic matter (OM) levels. The document emphasizes variability between fields and includes data percentages of soil samples with nutrient deficiencies. This information is crucial for farmers, agronomists, and researchers interested in soil health and crop management.

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Soil Nutrient Variability in Montana Fields: 2011 AGVISE Laboratories Report

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  1. AGVISE Laboratories%Zone or Grid Samples – Northwood laboratory1997 - 2011 % Grid or Zone Samples Tested Compared To Total Number of Samples Tested

  2. AGVISE Laboratories%Zone or Grid Samples Tested Compared to Total Number of Samples Tested in 2011

  3. Average Soil Nitrate following Wheat in 2011 Fall 2011 samples (lb/a 0-24” samples) 32 26 36 38 36

  4. Soil Nitrate Variability Between Fields Following “WHEAT” in Montana - 2011

  5. Average Soil Nitrate following Wheat in 2011 MB Fall 2011 Samples 41 (lb/a 0-24” samples) 56 38 46 39 49 33 42 37 40 44 39 35 ND 48 44 40 29 47 42 56 MN 49 55 SD 34 45

  6. Soil Nitrate Variability Between Fields Following “Fallow” in Montana - 2011

  7. % Soil Samples with Phosphorus less than 10 ppm Fall 2011 samples (0-6”) (Olsen P test) 46% 70% 41% 58% 45% 32%

  8. % Soil Samples with Phosphorus less than 10 ppm Fall 2011 samples MB 43% (0-6” samples) 38% (Olsen P test) 50% 53% 21% 60% 28% 29% 34% 83% 77% 77% 60% 64% 72% ND 53% 59% 71% 65% 74% 37% 66% MN 46% 55% 36% SD 29% 43% 63% 46% 36%

  9. % Soil Samples with Potassium less than 150 ppm Fall 2011 samples (0-6”) 1% 7% 2% 21% 7% 7%

  10. % Soil Samples with Potassium less than 150 ppm MB Fall 2011 samples 29% 8% (0-6” samples) 28% 28% 20% 3% 13% 23% 15% 3% 5% 2% 15% 74% 35% ND 7% 24% 79% 6% 51% 6% 54% 1% 5% 28% MN 32% SD 40% 0% 5% 29% 43%

  11. % Soil Samples with Zinc less than 1.0 ppm Fall 2011 samples (0-6”) 89% 69% 79% 53% 55% 45%

  12. % Soil Samples with Zinc less than 1.0 ppm MB Fall 2011 samples 33% 55% (0-6” samples) 53% 28% 66% 48% 31% 37% 88% 74% 80% 52% 72% 49% ND 52% 22% 85% 65% 64% 72% 22% 82% 55% MN 64% 32% SD 36 72% 47% 40% 38%

  13. % Soil Samples with Sulfur less than 15 lb/a Fall 2011 samples (0-6”) 48% 58% 49% 25% 25% 52%

  14. % Soil Samples with Sulfur less than 15 lb/a MB Fall 2011 samples 9% 14% (0-6” samples) 18% 3% 14% 11% 26% 8% 14% 63% 25% 31% 12% 40% 13% ND 34% 53% 17% 43% 23% 66% 55% 32% MN 63% 22% 49% SD 37% 75% 67% 22% 51%

  15. % Soil Samples with Copper less than 0.5 ppm Fall 2010 samples (0-6”) 1% 3% 1% 2% 1%

  16. % Soil Samples with Copper less than 0.5 ppm MB Fall 2011 samples 13% 2% (0-6” samples) 15% 8% 22% 3% 8% 3% 12% 2% 17% 3% 12% 27% 30% ND 7% 45% 10% 20% 17% 9% 21% 11% 7% MN 4% 5% SD 1% 2% 4% 0%

  17. % Soil Samples with Boron less than 0.4 ppm Fall 2011 samples (0-6”) 6% 5% 6% 5% 4% 2%

  18. % Soil Samples with Boron less than 0.4 ppm MB Fall 2011 samples 0% (0-6” samples) 1% 4% 0% 10% 2% 1% 5% 3% 8% 26% 5% ND 3% 13% 42% 88% 4% 17% 58% 21% 19% MN 20% SD 15% 7% 30%

  19. % Soil Samples with Chloride less than 40 lb/a Fall 2011 samples (0-6”) 80% 82% 82% 81% 60% 69%

  20. % Soil Samples with Chloride less than 40 lb/a MB Fall 2011 Samples 59% (0-24” samples) 46% 61% 66% 21% 79% 64% 43% 44% 96% 73% 82% 47% 32% ND 78% 92% 57% 67% 94% 81% 92% 51% MN 69% 89% SD 48% 89%

  21. % Soil Samples with Carbonate greater than 5.0% Fall 2011 samples (0-6”) 11% 19% 20% 14% 3% 54%

  22. % Soil Samples with Carbonate greater than 5.0% MB Fall 2011 samples 22% (0-6” samples) 35% 38% 18% 25% 8% 13% 43% 13% 9% 3% 22% 24% ND 5% 8% 25% 6% 5% 1% MN 6% 32% SD 1% 10% 5%

  23. % Soil Samples with Salts greater than 1.0 mmhos/cm Fall 2011 samples (0-6”) 4% 3% 4% 5% 8% 4%

  24. % Soil Samples with Salts greater than 1.0 MB Fall 2011 Samples 11% 21% (0-6” samples) 18% 19% 33% 11% 7% 14% 21% 2% 15% 7% 36% 20% 4% ND 7% 3% 0% 1% 24% 18% 1% 3% 22% MN 9% 4% SD 1% 1% 4% 11% 2%

  25. % Soil Samples with soil pH greater than 7.3 Fall 2010 samples (0-6”) 69% 78% 78% 86% 93% 73%

  26. % Soil Samples with Soil pH greater than 7.3 MB Fall 2011 samples 74% 96% (0-6” samples) 82% 63% 80% 68% 73% 76% 75% 75% 56% 80% 65% 96% ND 38% 5% 69% 42% 82% 40% 64% 17% 23% MN 33% 58% SD 21% 26% 25% 30% 20%

  27. % Soil Samples with %OM less than 3.0% Fall 2011 samples (0-6”) 94% 81% 73% 81% 88% 58%

  28. % Soil Samples with %OM less than 3.0% MB Fall 2011 samples 6% 6% (0-6” samples) 13% 8% 35% 9% 30% 8% 22% 67% 31% 37% 19% 19% 29% ND 21% 53% 82% 22% 25% 32% 31% 50% MN 26% 10% 8% SD 14% 28% 5% 20% 8%

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

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