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GFO Nitrogen Research - Season 2016
Target Soil Nitrate Sample Timing
------------------ Soil Nitrate (ppm) ------------------
Location Previous Crop Soil Texture Planting V1-V2 V3-V4* V6 V9
Alma Soybeans Loam 7.50 11.90 14.40 18.80 14.00
Alvinston, East Soybeans Clay 9.00 7.10 12.90 36.60 11.10
Alvinston, West Soybeans Loam 5.10 9.90 10.80 16.90 7.77
Belmont Soybeans Silt Loam 5.30 5.70 11.50 11.60 6.46
Bornholm, Clover Wheat Loam 7.10 9.40 14.20 17.70 13.13
Bornholm, No Clover Wheat Loam 6.40 8.50 11.20 14.70 14.32
Chesterville Soybeans Clay Loam 3.60 7.30 7.40
Colborne, East Wheat Loamy Sand 5.30 9.00 9.40 8.60 3.77
Colborne, West Wheat Sandy Loam 6.20 6.90 7.60 7.10 3.78
Courtland Corn Sandy Loam 2.00 1.70 3.20 2.10 2.37
Dresden Soybeans Clay Loam 4.60 6.40 11.10 7.40 3.56
Elora Wheat Loam 6.20 7.00 10.80 5.70 7.49
Elora South Corn Loam 4.80 9.30 5.00 5.70 6.36
Exeter Wheat Clay Loam 5.40 9.70 13.00 27.05
Lucan, Soy Residue Soybeans Loam 4.20 7.40 11.60 10.00 9.25
Lucan, Wheat Residue Wheat Loam 6.00 11.40 20.10 16.40 12.54
Moorefield Soybeans Loam 7.30 10.70 20.00 23.60 9.72
North Gower Wheat Clay Loam 17.10 17.70 20.40
Port Stanley Soybeans Sandy Loam 4.10 6.60 11.00 7.23
Ridgetown Wheat Clay Loam 4.10 6.40 12.10 15.50 11.39
Wallacetown Soybeans Clay Loam 4.40 4.80 6.60 2.77
Waterloo Wheat Sandy Loam 5.70 8.60 13.30 10.20 7.00
Winchester Spring Cereals Silt Loam 9.50 7.60
* 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.