Nitrogen

In this episode, Dr Lucy Bell discusses her PhD research into legume species that can thrive in hill and high country soils affected by high aluminium toxicity. She explains why traditional options like lucerne struggle in these environments, highlights the standout performance of species such as Lotus pedunculatus and crimson clover, and outlines what this could mean for improving nitrogen supply, forage quality and animal performance in challenging farming systems.

The suggestion that dairy cow urine is the source of so many environmental problems deserves re-examination, Jacqueline Rowarth writes.