Consider the history of seeding:

For decades, double disc box drills dominated the market. In the 1980’s air delivery with shank openers changed the market. Ten years later, it was single disc drills with air delivery. In 2008, Amity Technology introduced the Single Disc Drill. Now tested for two seasons, farmers are finding significant advantages with the new Amity Single Disc Drill.

The first new drill technology in 20 years

Amity Single Disc Drills are uniquely simple, easy to operate and maintain. The Single Disc Drill story First invented and patented in Australia, the team at Amity (the same people who created and marketed the revolutionary Concord Air Till Drill) saw the potential of the Single Disc Drill. Amity bought it and brought the implement manufacturing to Fargo, North Dakota.

Amity tested an initial run of 25 Single Disc Drills in the northern plains in 2008. Amity saw needed design modifications to seed effectively into heavy clay soils, and spent the fall and winter 2008-2009 making changes necessary to seed soils common throughout North America.