Much of this was achieved through a field survey of 300 1km squares across Wales, half of which were focussed on areas prioritised for advanced payments.
Cyflawnwyd llawer o hyn drwy arolwg maes o 300 o sgwariau 1km ledled Cymru, gyda hanner ohonynt yn canolbwyntio ar ardaloedd sy’n cael blaenoriaeth ar gyfer taliadau uwch.