Using certified potatoes will increase yields

This explains why potatoes don't seem to "grow" like they did when I was a boy:

Since potatoes are susceptible to several serious diseases, buy certified, disease-free potatoes at garden centers and mail-order nurseries. Potatoes that remain from last year’s crop may carry undetectable diseases. Potatoes purchased at supermarkets (for table use) have usually been treated to prevent sprouting.

This is a shame for a lazy gardener like me. I might plant a few potatoes from my kitchen, but can't picture myself ordering certified potatoes online.

Link: QCTimes.com - The Quad-City Times Newspaper Features.