However, drier conditions may be beneficial for other marginal areas that could see an improvement in ALC grade (i.e. shift from Grade 4 to 3b).
Fodd bynnag, gallai amodau sychach fod o fudd i ardaloedd eraill ar y cyrion a allai weld gwelliant mewn graddfa ALC (hynny yw, symudiad o Raddfa 4 i 3b).