Dwarf mistletoe had no noticeable effect on trunk taper of young, dominant and codominant red firs 4 to 22 inches (10.2 to 55.9 cm) d.b.h. Also, taper was not influenced by live crown ratio of infected and uninfected trees. Trees less than 7 inches d.b.h. had significantly more taper than larger trees, irrespective of dwarf mistletoe.
The procedure for determination of running skyline load-carrying capability is discussed. A desk-top computer/plotter is employed to plot terrain profiles and determine and plot the path of a loaded running skyline carriage. The computer programs implementing the procedure are included. The paper is intended for the designer who is investigating the use of running skylines in harvesting plans.