Given the need to control costs of the survey and the difficulty of recruiting farms, the sample for the Farm Business Survey is limited to 550 farms per year in Wales.
Gan ystyried yr angen i reoli costau'r arolwg a'r anhawster o ran recriwtio ffermydd, mae'r sampl ar gyfer yr Arolwg o Fusnesau Ffermio wedi'i gyfyngu i 550 o ffermydd y flwyddyn yng Nghymru.