Fodd bynnag, ni ddylem wneud y camgymeriad o feddwl mai dim ond plant a phobl ifanc sydd ar fai am y broblem hon. Mae'r dystiolaeth yn dangos bod rhai tanau mawr yn cael eu cychwyn gan berchnogion tir sy'n awyddus i glirio tir y tu allan i'r tymor llosgi pan ganiateir iddynt wneud hynny. Mae'r tymor hwnnw'n dod i ben ar yr ucheldiroedd ar 31 Mawrth. Mae eu hymddygiad hwythau yr un mor anghyfrifol ac anghyfreithlon ag ymddygiad y person ifanc sy'n cynnau tân oherwydd synnwyr cyfeiliornus o hwyl a sbri neu antur. Gall tanau o'r math hwn ymledu'n rhy hawdd, gan fynd allan o reolaeth, a gwneud darnau helaeth o dir yn amhosibl eu defnyddio at ddibenion amaethyddol. Gall perchnogion tir hefyd gyfrannu'n gadarnhaol at ein gwaith drwy reoli eu tir mewn modd sy'n ei gwneud yn anoddach i eraill gynnau tân arno, ac rydym ni a'n partneriaid wedi bod yn ymgysylltu â'r gymuned ffermio i ledaenu'r negeseuon hyn.
However, we should not fall into the trap of blaming only children and young people for this problem. There is evidence of some large fires being started by landowners who wish to clear land outside the permitted burning season, which in upland areas ends on 31 March. This behaviour is just as irresponsible and illegal as a young person setting a fire out of a misguided sense of fun or adventure. And such fires can all too easily spread out of control, leading to large areas of land being completely unusable for any agricultural purpose. Landowners can also contribute positively, by managing their land in ways which make it harder for others to set fires. We and our partners have also been engaging with the farming community to spread these messages.