This rug as many Kurdish rugs was surely woven on an horizontal loom. This explains his crude construction and the use of gradations in the weft density and wedge like inserts to counteract irregular weaving.

I think, and I apologize if I am wrong that these pictures illustrate some of the technical details you are speaking about.

I think arrows 1, 2 & 3 illustrates discontinuous knotting in wedge-shaped areas, and discontinuous wefts.