In addition, lambing conditions were especially challenging last year and as a result lower numbers were presented to the market in the summer, followed by a glut of additional lambs in the autumn.
Hefyd, roedd yr amodau adeg y tymor wyna llynedd yn arbennig o anodd, ac o’r herwydd cafodd llai o ŵyn eu cymryd i’r farchnad yn yr haf ac roedd gormodedd o ŵyn ar ôl yn yr hydref.