If used carefully, at suitable times of year, and in conjunction with more traditional methods, these too can help keep a hedgerow in good condition.
Os caiff y rhain eu defnyddio’n ofalus, ar adegau priodol o’r flwyddyn, ac ar y cyd â dulliau mwy traddodiadol, gallan nhw hefyd helpu i gadw gwrych mewn cyflwr da.