For the weight of soils and stones disposed at the lower rate of tax, there was a 26% decrease from the same quarter a year earlier, to 40 thousand tonnes.
Ar gyfer pwysau priddoedd a cherrig a waredwyd ar y gyfradd dreth is, bu gostyngiad o 26% o'r un chwarter flwyddyn ynghynt, i 40 mil o dunelli.