Drain
When the chips are down
24 May 2019
Groundwater scientists are using John Saywell's Canterbury farm to measure how well buried trenches filled with woodchips and bacteria break down nitrates in drainage water. Audio, Gallery
When the chips are down
24 May 2019
Groundwater scientists are using John Saywell's Canterbury farm to measure how well buried trenches filled with woodchips and bacteria break down nitrates in drainage water.
Audio