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GFO Nitrogen Research - Season 2017
Target Soil Nitrate Sample Timing
------------------ Soil Nitrate (ppm) ------------------
Location Previous Crop Soil Texture Planting V1-V2 V3-V4* V6 V9
Alvinston Soybeans Loam 3.40 8.00 7.40 12.60 8.59
Arva Wheat Loam 2.80 5.80 7.70 13.50 3.21
Belmont Wheat Silt Loam 2.70 6.80 10.20 14.50 6.39
Bornholm, Clover Spring Cereals Loam 3.90 8.40 7.40 15.30 12.30
Bornholm, No Clover Spring Cereals Loam 2.10 8.10 7.50 14.50 10.27
Bowmanville Corn Loam 8.50 7.10 7.00 8.60 8.24
Brucedale Soybeans (Rye Cover Crop) Loam 2.60 4.30 4.70 9.01 5.57
Chesterville Soybeans Clay Loam 2.60 7.80 6.80 12.70 14.42
Courtland Corn Sandy Loam 3.30 4.70 5.60 4.50 5.15
Dresden Soybeans Loam 5.00 7.30 8.30 11.30 6.08
Drumbo Soybeans (Rye Cover Crop) Loam 2.30 3.10 11.70 12.70 17.59
Elora Soybeans Loam 3.30 6.20 9.20 11.61 4.64
Elora, South Corn Loam 0.90 5.50 5.00 11.07 7.14
Exeter Corn Clay Loam 4.50 5.90 6.60 14.40 10.03
Moorefield Wheat Loam 4.90 12.60 14.20 18.60 6.74
Morrisburg Soybeans Clay Loam 4.70 5.80 10.90 12.30 8.05
Port Perry Wheat Loam 3.80 6.80 6.50 7.70 7.33
Ridgetown Wheat Clay Loam 5.10 9.60 11.50 14.70 17.03
St. Thomas Soybeans Silt Loam 4.90 8.00 8.90 5.30 9.28
Wallacetown Soybeans Sandy Loam 2.20 4.70 5.40 9.20 4.50
Watford Wheat Clay 5.50 11.00 11.10 17.50 12.92
Wicklow Wheat (Oat Cover Crop) Sandy Loam 3.00 3.70 4.10 2.30 3.37
Winchester Wheat Silt Loam 4.20 6.30 6.90 14.20 14.42
* V3-V4 represents the "typical" sample timing that Ontario PSNT recommendations have been developed with.
DISCLAIMER - These results represent soil nitrate levels collected from a small area at each location. Soil nitrate results are strongly influenced by environment (precipitation, temperature) and field characteristics (soil texture, organic matter, previous crop etc.). These values are for observing changes in soil nitrate concentrations within a location over time only and should not be used for recommendation purposes on your own farm. If you would like to use the PSNT test, it is important to sample your own farm. Guidelines for sampling available here.