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ARS Home » Midwest Area » Columbus, Ohio » Soil Drainage Research » Research » Research Project #438148

Research Project: Quantifying the Role of Legacy Phosphorus in Water Quality in the Western Lake Erie Basin Watershed

Location: Soil Drainage Research

Project Number: 5080-13210-002-43-A
Project Type: Cooperative Agreement

Start Date: May 1, 2020
End Date: Apr 30, 2024

Objective:
Quantify the role of in-field legacy phosphorus to surface and subsurface phosphorus transport.

Approach:
The assessment of legacy phosphorus will be analyzed using existing data and statistical methods as well as using a field scale experiment. Existing data will be examined by identifying phosphorus losses resulting from recent fertilizer applications and comparing those losses to fields and time periods when there was no fertilizer application. The field approach will involve adding phosphorus on a small portion of the field to create a 'hot spot' and then measuring the phosphorus concentrations in both surface and subsurface discharge to quantify if there was a change in the water quality signature.