Hielke De Jong

Gee, I thought a whole book about one crop would be able to answer my one question. No such luck. There is a paragraph early on that talks about determinate versus indeterminate growth, the second type giving more potatoes per plant. Okay, no diagrams even. And in the section detailing the varieties, you'd think this aspect might be noted. Sorry, no.
There is a section of very good color photos illustrating all sorts of fascinating bits about this crop plant.