Driving impression: Kverneland NG-S 301/DA-X combi unit Way back in 2002, Kverneland launched its DA-X air seeder, to be followed just a year later by the NG-S 101 power harrow. Couple up the pair, and the result is the harrow/drill combination featured here – in all its red and green glory. We operated the combi last autumn across a range of soil types