In general, no, a roto-tiller is not meant for cutting through roots. It is just meant for "fluffing up" soil that has become packed or hard.
My roto-tiller is a little electric push-type, and it won't cut anything bigger than grass roots. But it will "grind away" at larger root of flowers and bushes until they eventually give through. I usually get out the shovel or pick once I hit something like that.
a rototiller
The roots provide the life source to the tree , so, cut the roots, kill the tree.
* Dig them out. * use roundup You cant use Round up if it has been cut down,
There are many places that one could find a Rototiller for purchase. One popular place where you will be able to get advice on the best Rototiller for you would be Lowes.
pull it out by the roots. even like that it can still live, so cut up the roots and sements into multiple pieces
Cutting a tree down dos not kill it. The roots are still alive and well and often put up shoots from the cut off trunk to replace the original trees canopy. Killing the root of a tree after it is cut down often entails digging the roots up or injecting the stump with herbicide or other poisons.
because you cut them off from the roots
of course you can!
because the forest that cut and replanted has an old roots and its dried up
Cut flowers can live for a short time in water because the water moves up their stems and keeps them fresh. They will die because the roots are needed to bring them nutrients in addition to the water.
seaweed is
The plant gets its water and nutrients by the roots. No roots = no water, no "food" = Death.