Where to put blackberry vines?

Blackberries grow quickly when there is water and die quickly when it is dry... We have cut a lot of blackberry vines. They have to go, I don't like them as mulch because I walk barefoot. Burning is also out of the question, it is forbidden here from the beginning of May. So I bury them. Here I dig a big hole into which I stomp them later, cut into small pieces. A lot of work, but it is also an excellent preparation for planting a fast-growing tree later...