Trend for Precision Soil Testing % Zone or Grid

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Trend for Precision Soil Testing % Zone or Grid

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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 2017 AGVISE Laboratories Zone or Grid Samples Northwood

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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 2017

AGVISE Laboratories%Zone or Grid Samples – Northwood laboratory1997 - 2017 % Grid or Zone Samples Tested Compared To
Conventional Whole Field Composite Samples Tested

35 32 40 43 80 84 47 59 26 25 50 62 25 29 34 Median Soil Nitrate following Wheat in 2017 Fall 2017 Samples (lb/a 0-24” samples) MB ND SD MN 63 61 45 24 28 35 29 40

Average Soil Nitrate Following “Wheat” in Canada1986 - 2017 Nitrate-N (0-24” lb/a)

Soil Nitrate Variability Between Fields Following “Wheat” in Canada 2016 & 2017

26 31 42 59 36 42 34 38 Median Soil Nitrate following Canola in 2017 Fall 2017 Samples (lb/a 0-24” samples) MB ND SD MN 32 28 42 40 31 40

Average Soil Nitrate Following “Canola”1986 - 2017 Nitrate-N (0-24” lb/a)

Soil Nitrate Variability Between Fields Following “Canola” in Canada – 2016 & 2017

Average Soil Nitrate Following “Barley” in Canada1986 - 2017 Nitrate-N (0-24” lb/a)

Soil Nitrate Variability Between Fields Following “Barley” in Canada – 2016 & 2017

Average Soil Nitrate Following “Potato” in Canada1986 - 2017 Nitrate-N (0-24” lb/a)

Soil Nitrate Variability Between Fields Following “Potato” in Canada – 2016 & 2017

43 37 44 56 47 43 52 54 66 53 59 Median Soil Nitrate following Corn in 2017 Fall 2017 samples (lb/a 0-24” samples) MB ND SD MN 35 32 59 47 65 45 57 61 56

Average Soil Nitrate Following “Corn” in Canada1988 - 2017 Nitrate-N (0-24” lb/a)

Soil Nitrate Variability Between Fields Following “Corn” in Canada – 2016 & 2017

23 29 21 22 22 23 23 22 26 23 30 Average Soil Nitrate following Soybean in 2017 Fall 2017 samples (lb/a 0-24” samples) MB ND SD MN 19 20 22 36 22 28 30 15 28 23 29 24

Average Soil Nitrate Following “Soybeans” in Canada 1998 - 2017 Nitrate-N (0-24” lb/a)

Soil Nitrate Variability Between Fields Following “Soybean” in Canada 2016 & 2017

48% 52% 65% 47% 56% 45% 66% 64% 61% 67% 29% 21% 27% 48% 49% 29% 65% % Soil Samples with Phosphorus less than 10 ppm Fall 2017 samples (0-6” samples) MB ND SD MN 42% (Olsen P test) 39% 57% 34% 36% 38% 33% 31% 39% 50% 36% 58%

23% 19% 7% 5% 7% 11% 4% 3% 46% 39% 14% 29% 28% 33% 16% 10% % Soil Samples with Potassium less than 150 ppm Fall 2017 samples (0-6” samples) MB ND SD MN 30% 21% 43% 25% 9% 35% 29% 28% 26% 6% 5% 1% 60% 79% 21%

52% 41% 69% 51% 70% 83% 81% 53 68% 43% 27% 51% 35% 62% 59% 48% 87% % Soil Samples with Zinc less than 1.0 ppm Fall 2017 samples (0-6” samples) MB ND SD MN 21% 24% 13% 52% 17% 30% 43% 41% 57% 77% 17% 47% 66% 89%

6% 7% 14% 29% 20% 36% 11% 27% 7% 4% 3% 2% 2% 2% 5% 5% 9% 5% % Soil Samples with Sulfur less than 15 lb/a Fall 2017 samples (0-6” samples) MB ND SD MN 13% 80% 73% 89% 79% 77% 19% 59% 55% 40% 32% 49% 48%

25% 25% 30% 29% 30% 58% 74% 40% 26% 26% 17% 9% 20% 6% 21% 30% 29% % Soil Samples with %OM less than 3.0% Fall 2017 Samples (0-6” samples) MB ND SD MN 7% 4% 11% 76% 43% 20% 6% 28% 26% 24% 50% 13% 25% 3%

54% 33% 46% 53% 79% 78% 81% 60% 70% 40% 21% 90% 67% 54% 41% 23% 21% 10% 47% 26% 37% 38% % Soil Samples with Chloride less than 40 lb/a Fall 2017 Samples (0-24” samples) MB ND SD MN 52% 78% 83% 34% 75%

14% 16% 11% 15% 12% 3% 5% 1% 10% 33% 37% 36% 12% 3% 3% 12% 19% 4% 29% 28% 15% 17% % Soil Samples with Copper less than 0.5 ppm Fall 2017 samples (0-6” samples) MB ND SD MN 11% 4% 12% 6% 24% 52% 49% 8%

3% 3% 3% 3% 11% 13% 3% 25% 9% 2% 1% 3% 5% 7% 1% % Soil Samples with Boron less than 0.4 ppm Fall 2017 samples (0-6” samples) MB ND SD MN 1% 21% 51% 88% 23% 17% 16% 9% 18% 9% 43% 19% 9% 0% 0% 16%

71% 82% 82% 51% 31% 46% 72% 55% 30% 58% 83% 98% 49% 43% 23% 30% 74% 90% 85% 79% 53% 77% % Soil Samples with Soil pH greater than 7.3 Fall 2017 samples (0-6” samples) MB ND SD MN 72% 30% 17% 21% 21% 10% 59% 97% 89%

2% 2% 1% 4% 13% 12% 1% 5% 32% 15% 3% 1% 16% 8% 40% 11% 1% 7% 1% 3% 18% 1% % Soil Samples with Soil pH less than 6.0 Fall 2017 samples (0-6” samples) MB ND SD MN 1% 8% 14% 13% 15% 29% 9% 0% 4% 11%

2% 2% 1% 2% 7% 3% 2% 1% 19% 3% 1% 1% 7% 3% 19% 4% 1% 1% 1% 2% 13% 2% % Subsoil Samples with pH less than 7.0 Fall 2017 samples (0-6” samples) MB ND SD MN 1% 4% 7% 9% 5% 1% 5% 13%

10% 31% 16% 6% 6% 4% 8% 26% 40% 34% 10% 14% 3% 14% 36% 21% 32% 15% 10% % Soil Samples with Carbonate greater than 5.0% Fall 2017 samples (0-6” samples) MB ND SD MN 43% 17% 1% 35% 59% 13% 10% 0% 2% 5%

19% 43% 26% 12% 4% 5% 5% 11% 1% 3% 11% 20% 3% 6% 5% 16% 23% 19% 37% 17% 13% 17% % Soil Samples with Salts greater than 1.0 Fall 2017 Samples (0-6” samples) MB ND SD MN 8% 1% 3% 4% 7% 24% 21% 15%

Manitoba - % Samples Testing with Salts greater than 1.0 1:1 salt method – expressed as mmhos/cm 582 Grand Forks R0G - Winkler R0K - Brandon

Trend for Precision Soil Testing % Zone or Grid

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