AGVISE Laboratories %Zone or Grid Samples – Northwood laboratory 1997 - 2011 % Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested

AGVISE Laboratories %Zone or Grid Samples Tested Compared to Conventional Whole Field Composite Samples in 2011

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

Average Soil Nitrate following Wheat in 2011 (change from 2010 averages – More high testing fields) MB Fall 2011 Samples +3 +18 (lb/a 0-24” samples) +10 +12 +14 +7 +3 +7 +5 +13 +15 +5 +2 ND +11 +12 +15 +6 +12 +9 MN +9 +13 SD +2

Soil Nitrate Variability Between Fields Following “WHEAT” in 2011

Average Soil Nitrate Following “WHEAT” 1986-2011 107 96 81 68 Nitrate-N (0-24”) 64 59 60 61 60 56 54 53 50 48 46 46 42 44 43 41 40 38 35 35 32 29 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Average Soil Nitrate Following Wheat For Region (1986-2011) Deep “N” (24-48” lb/a) 63 59 53 51 49 46 43 44 41 Nitrate-N (24-48” lb/a) 35 36 34 32 31 29 29 29 27 20 18 18 18 19 15 13 14 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Soil Nitrate Variability Between Fields Following “Barley” in 2011

Average Soil Nitrate Following “BARLEY 1986-2011 95 84 70 Nitrate-N (0-24” lb/a) 56 52 53 53 50 47 48 45 45 43 39 40 41 37 39 35 35 35 34 29 30 29 27 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Soil Nitrate Variability Between Fields Following “Sunflower” in 2011

Average Soil Nitrate Following “SUNFLOWER” 1986- 2011 101 82 Nitrate-N (0-24” lb/a) 70 55 50 47 49 50 48 50 50 46 47 48 43 43 44 44 40 32 34 33 30 27 25 22 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Soil Nitrate Variability Between Fields Following “Dry Beans” 2011

Average Soil Nitrate Following “DRY BEANS” 1986-2011 102 100 78 Nitrate-N (0-24” lb/a) 72 70 65 65 66 61 61 58 57 58 53 52 53 55 51 49 46 46 44 41 38 34 35 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Soil Nitrate Variability Between Fields Following “Sugarbeet” in 2011

Average Soil Nitrate Following “SUGARBEET” 1986- 2011 53 48 47 Nitrate-N (0-24” lb/a) 30 25 25 25 25 22 23 22 22 21 20 20 21 21 21 19 18 17 16 17 16 15 13 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Soil Nitrate Variability Between Fields Following “Fallow” in 2011

Average Soil Nitrate Following “FALLOW” 1986-2011 149 143 128 119 102 98 93 84 85 80 79 81 79 75 Nitrate-N (0-24” lb/a) 67 69 66 58 60 62 59 60 55 48 50 46 86 88 90 92 94 96 98 00 02 04 06 08 10 2011

Soil Nitrate Variability Between Fields Following “Soybeans” in 2011

Average Soil Nitrate Following “SOYBEAN” 1995-2011 35 35 33 32 31 31 30 30 29 29 28 27 27 27 26 Nitrate-N (0-24” lb/a) 24 23 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 2010

Average Soil Nitrate following Corn in 2011 Fall 2011 samples MB (lb/a 0-24” samples) 49 46 70 55 43 33 33 ND 43 29 35 33 38 39 35 39 MN 47 42 SD 42 46 62

Average Soil Nitrate following Corn in 2011 (Change from 2010 averages) Fall 2011 samples MB (lb/a 0-24” samples) +1 +12 +22 +17 +14 +3 +4 ND -3 +2 +1 -1 -18 -13 MN -13 -8 SD -8 -5 -7

Soil Nitrate Variability Between Fields Following “Corn” in 2011

% 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% 34% 29% 83% 77% 77% 60% 72% 64% ND 53% 59% 65% 71% 74% 37% 66% 46% 55% MN 36% SD 29% 43% 63% 46% 36%

% Soil Samples with Phosphorus less than 10 ppm “Percentage Change from 2010” (More low testing fields) Fall 2011 samples MB (0-6” samples) (Olsen P test) -6% +20% +6% +7% +8% +4% +9% +1% +2% -3% +5% +3% -12% ND -3% +7% +2% -3% +7% +1% +2% +1% +6% MN +1% SD +4% +3% +2% -3%

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

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

% 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% 13% 40% ND 34% 53% 43% 17% 23% 66% 55% 63% 22% 32% MN 49% SD 37% 67% 22% 51% 75%

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

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

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

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

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

% Soil Samples with Salts greater than 1.0 “% Change from 2010” (more high salt fields) MB Fall 2011 Samples +5% +12% (0-6” samples) +2% +9% +10% +4% +9% -1% -1% +6% 7% +10% +7% -3% ND 0% +1% 0% +1% +10% +8% 0% +3 +8% MN +3 +1% SD 1% -3% +6% 1% +1%

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

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