Features of formation a trees trunk to influence of a wind, negative geotropism and a gravity are revealed. Objects of research have been chosen Abies sachalinensis Mast., Pinus sylvestris L., Larix kurilensis Mayr, Pinus pumila (Pall) Reqel и Quercus crispula Blume. Width of year layers from opposite sides on a vector of action of force, and also the width of a year layer and late wood in it are connected by rectilinear dependence, communication degree between these signs from moderated to very high.