06:00Byd Amaeth28/07/2012BBC Radio Cymru Duration: 30 o funudau Sat 28th Jul 2012, 06:00 on BBC Radio CymruY diweddaraf o'r byd ffermio gyda Dei Tomos. The latest farming news with Dei Tomos.GenresFactualScience & NatureBrandByd Amaeth Source: BBC Online