apply lime, if necessary, to maintain a soil pH of between 5.5 and 6.5 on neutral grasslands
cymhwyso calch, ac eithrio ar gyfer tir parc, lle bernir bod angen cynnal pH y pridd rhwng 5.5 a 6.5 a chyda hysbysiad a chytundeb ymlaen llaw ar RPW Ar-lein