Subterranean clover's ability to bury its seed supports pasture persistence but makes commercial seed harvesting difficult. The industry relies on aging Horwood-Bagshaw (HB) suction harvesters, which collect seed from fully dry crops after repeated tillage and raking.
Source: [Phys.org](https://phys.org/news/2026-08-earlier-swathing-pathway-subterranean-clover.html)