Is it permissible for me to place my goods on lands owned by others, knowing that they do not fence them but only place stones?

It is impermissible to benefit from land owned by others except with the permission of its owners, even if it is not fenced. It is not a condition for the permission to be explicit verbally; rather, knowledge of the owner's consent, based on custom or acknowledgment, suffices. Thus, customary permission is like verbal permission.