Soil Nutrient Studies

Soil nutrient studies have been conducted for agronomic and environmental purposes, in three regions of British Columbia: Hullcar Valley (2016), the Lower Fraser Valley (2012 and 2005), and the Okanagan-Similkameen Valley (2007).

2016 Post-Harvest Nitrate Study: Hullcar Valley


  • In the fall of 2016, 40 agricultural fields over or near the ‘Hullcar Aquifer 103’ were sampled
  • Post-harvest nitrate test (PHNT) values were high or very high in 38% of the fields sampled, medium in 43% of the fields, and low in 20% of the fields
  • Average PHNT was 113 kg N/ha among annual crops (primarily corn), 54 kg N/ha among perennial crops (primarily alfalfa)
  • The study is ongoing; the next step is to determine how much post-harvest nitrate potentially leaches between growing seasons
  • The anticipated completion date of the study is the end of May 2017

Read the full progress report:

Individual field results:

Previous Studies

2012 Fraser Valley Soil Nutrient Survey - Results by Crop Group: