Someone wrote: "Closer the graft is to the ground the more leverage the wind
has to break it off.
That's good news if significant but I wonder how much difference 7 to nine
inches would make. (I imagine nafex response might run along a gender line
here). I imagine that torque would decrease exponentially with length, but I
haven't had much experience with this. It would make an easy experiment with
a spring scale. Any volunteers?