This is best carried out in the spring or early summer, but only if ground conditions allow. It needs to be dry enough to carry the weight of the tractor without causing damage to the ground.
Harrowing pulls up dead grass, providing space for healthy grass to fill. Harrowing also breaks up the surface of the ground allowing better drainage and an increase in available nutrients for plant uptake.
This disturbance of the ground surface, promotes tillering (new grass shoots). This increases sward density, reducing the opportunity for weeds to take hold in the pasture.
Aerates the sward
Encourages more vigorous growth
Helps prevent thatch and moss build up
Breaks up and spreads manure and mole hills