BOZEMAN - Montana rancher and inventor Lee Arbuckle may soon change the nation's market for native grass seed, a tricky-to-harvest crop worth hundreds of millions and vital to restoring wildlands.

The aim of the project was to create a machine that could, in one operation, tease dead grass out of the turf, create some tilth, spin on grass or clover seed and roll – all without breaking the bank.

Keen to improve grass quality for his pedigree Dexter suckler herd, Cornish farmer and contractor John Phizacklea built a single-pass overseeding outfit that is manoeuvrable enough to work in his ...