Aeration introduces air to the grassroots and soil to help root development to alleviate compaction, improve drainage, reduce slurry and fertiliser runoff. In short, aeration will ultimately grow more grass.
Independent studies show a marked increase in the performance of grass production on fields that have been regularly aerated. With this in mind aerating should be part of regular routine of grassland maintenance.
The best times to aerate are early in the season, prior to grass starting to grow and after the last cut of the year.