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

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

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

Average Soil Nitrate following Wheat in 2012 Fall 2012 Samples (lb/a 0-24 samples) MB ND SD MN

Average Soil Nitrate Following WHEAT in Canada Nitrate-N (0-24) lb/a Drought

Soil Nitrate Variability Between Fields Following Wheat in Canada

Average Soil Nitrate following Canola in 2012 Fall 2012 Samples (lb/a 0-24 samples) MB ND SD MN

Soil Nitrate Variability Between Fields Following Canola in Canada – 2012

Average Soil Nitrate Following Canola in Canada Nitrate-N (0-24) lb/a

Soil Nitrate Variability Between Fields Following Barley in Canada

Average Soil Nitrate Following BARLEY in Canada Nitrate-N (0-24) lb/a

Soil Nitrate Variability Between Fields Following Flax in Canada

Average Soil Nitrate Following FLAX in Canada Nitrate-N (0-24)

Soil Nitrate Variability Between Fields Following Potato in Canada

Average Soil Nitrate Following POTATO in Canada Nitrate-N (0-24)

Average Soil Nitrate following Corn in 2012 Fall 2012 samples (lb/a 0-24 samples) MB ND SD MN

Soil Nitrate Variability Between Fields Following Corn in Canada

Average Soil Nitrate Following CORN in Canada Nitrate-N (0-24)

Soil Nitrate Variability Between Fields Following Soybean in Canada 2012

Average Soil Nitrate Following Soybeans in Canada # of Fields Tested

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%

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%

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%

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% 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%

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%

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%

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%

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%

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%

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%

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

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