Been tracking down the perfect yew stave over here on vancouver island canada, for a couple of years now and have seen and split alot of yew, and have noted a few things.
- ring count and altitude seem to have no relation, it has more to do with light, water, and soil. I've found 50 rpi at 2 feet of altitude ( I was standing in the ocean while I cut it off the rock)
- The best staves seem to come from "leaders" where the tree splits off into smaller trees, the host tree can be a nasty mess of twist and limbs but can host straight leaders. those pieces in the pic look alot like leaders.
- Found many blow down yew in my travels (usually they go over with a large cedar) the ones that survive are interesting pieces because you can see in the ring count when the tree went over, the water soil and light are dramatically changed, you end up with two distinct ring counts -lower rpi closer to the center tighter rpi near the edge.
- The opposite occurs at the edge of a logging cut block, when the forest is cut back and a yew tree is left standing the growth rate increases drastically and you get two different ring counts.
-I believe that tree farming yew would have been possible because you don't need alot of material to build a bow, all you really need is 5inches round by 80inches long, that would make 20rpi in 50 years.
- The blow down yews seem to naturally grow multiple leaders which more often than not seem to be straight even though the host can be very twisted, and is living on its side.
- Figure out how to grow leaders, add alot of man hours and you got yourself a yew stave farm.