A control structure holds back water at the Morden Agriculture and Agri-Food Canada station in 2016, where a wood chip bioreactor was being tested. Photo: File

Bioreactors in tiled fields could themselves benefit from draining

Bioreactors are meant to filter nitrogen from tile water to help with runoff nutrient loads, but drying them out from time to time might increase their effectiveness

Bioreactors are meant to filter nitrogen from tile water and reduce extra nutrient running off int0 local rivers and lakes, but drying them out from time to time might increase their effectiveness.