Deer prevention
"symplastless" wrote in message
. ..
I try to make decisions based on data. I don't like ivy in trees because
it covers signs of high risks of hazard such as cracks. I don't like ivy
on trees. But I have not read data that stated ivy kills trees.
What if the data came from homeowners who observed ivy killing trees? Would
that be valid, or would it depend on who collected the data?
|