Soil Nutrient Studies

Soil nutrient studies have been conducted for agronomic and environmental purposes, in three regions of British Columbia: Hullcar Valley (2016 and 2017), the Lower Fraser Valley (2012 and 2005), and the Okanagan-Similkameen Valley (2007).

2017 Post-Harvest Nitrate Study: Hullcar Valley

Highlights of Progress Report

  • Monitoring the year-to-year trends of post-harvest soil nitrate is useful for improving the efficiency of nitrogen use
  • In the fall of 2017, 39 agricultural fields over or near the Hullcar Aquifer 103 were sampled for a Post-Harvest (Soil) Nitrate Test (PHNT) to compare with 2016 results
  • In 2017, PHNT values were high or very high in 5 (or 13%) fields, and low or medium in 34 (or 87%) fields
  • In 2016, PHNT values were high or very high in 18 (or 46%) fields, and low or medium in 21 (or 54%) fields
  • Results from 2016-2017 did not support the use of the PHNT soil test as a measure of environmental risk of nitrate leaching in the study area
  • Additional monitoring continues during the period between the 2017 and 2018 seasons of crop growth to determine the potential use of the PHNT to assess risk of nitrate leaching

Read the Progress Report:

Past reports:

Raw data:

Previous Studies

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