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Red pine grafted in Pinus sylvestris rootstock - tree surviving because branch of rootstock remains?

Red pine grafted in Pinus sylvestris rootstock - note some dying

Grafting of Larix - low grafts, branch habit persists

High grafting to avoid weeds

Gene for multiple cone production - poor for Christmas tree

Poor tree for Christmas tree, too many cones & open form
(compare to good one next to it), tree is a Pinus sylvestris

First picture is a Douglas fir near Duncan British Columbia aged 60 years. Second picture is Douglas fir stem near Duncan British Columbia

Colour variation in Douglas fir

Pollination bag on and off tree

Controlled pollination in pinus