graze to maintain a varied sward height where at least 75% of the grassland is between 5 cm and 20 cm between 1 June and 30 August
ei bori i gynnal porfa o uchder amrywiol gydag o leiaf 75% o'r glaswelltir rhwng 5cm ac 20cm rhwng 1 Mehefin a 30 Awst