Australia’s weed-seed destruction systems still remain a point of research in the U.S., with a handful of combines equipped with the grinding mills or outfitted to tow the pull-behind variants.
But while the technology remains limited to scientific evaluations here, the Australian group developing the machinery has now rolled out a newer and cheaper version of the initial design, which is marketed under the Integrated Harrington Seed Destructor (IHSD) nameplate.
With the new model, the grinding mill – which pulverizes weed seeds – has been mounted vertically. Mills with the original IHSD units were horizontally mounted.
In U.S. currency, the news model is priced at about $60,000. Additional charges apply to install the unit on a farmer’s combine, but the project can be done on the farm, according to an article in Australia’s Farm Weekly website.
Based on earlier pricing for the original horizontal mill, that’s about $25,000 less.
The hydraulically-powered cage mill spins at 3000 revolutions per minute (RPM). At that speed the mill can effectively grind seed and maintain a steady flow of dry matter.
“We know that when you are operating at over 3000 RPM, you are not getting the drop in capacity and you are getting the kill rate,’’ said Devon Gilmour, a dealer principal with McIntosh and Son. McIntosh Distribution markets the platform in Australia.
The vertical mill tests within 20 RPMs of that 3000-RPM target speed, Gilmour said.
With the vertical design, the system also includes a trap door that collects foreign material, plus a rear hatch for quickly checking grain losses. The vertical mill configuration broadens the number of machines on which the product can be installed, he added.
During Western Australia’s recent harvest, eight of the units were successfully tested in “bulky crops” and with a range of header brands with various capacities, according to the article.