  We study main bifurcations of multidimensional diffeomorphisms having a
non-transversal homoclinic orbit to a saddle-node fixed point. On a parameter
plane we build a bifurcation diagram for single-round periodic orbits lying
entirely in a small neighbourhood of the homoclinic orbit. Also a relation of
our results to well-known codimension one bifurcations of a saddle fixed point
with a quadratic homoclinic tangency and a saddle-node fixed point with a
transversal homoclinic orbit is discussed.
