Lawn scarifier. Scarification involves vertical cutting of the turf. Throughout the year, dead blades and grass clippings accumulate on the lawn, which cause the soil to become more sealed and dense. This situation means that rainwater, nutrients and air reach the roots of the grass much less. We scarify lawns that are over two years old. Thanks to this treatment, our lawn will be properly aerated, and with proper care it will be lush green.