What might that mean?
I usually buy 5-7 pounds of seed potatoes. It depends on what varieties are available at one or the other garden center and enthusiasm

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Horticulturists tell us that it matters very little how large the cut seed is as long as there is at least one viable eye. This has to be within reason, however. But, you don't want too many eyes growing resulting in crowding and smaller potatoes.
Then, somewhere between 160 and 200 square feet of ground is planted - double rows, 4' wide bed, plenty of room.
Potatoes don't keep all that well in my basement storage room and they begin to have problems about the first of February. One reason is that we like new potatoes and early varieties. Even the ones left to full die-back are harvested by about the first week of September. It's okay, the two of us are happy and have plenty from the garden for 6 months out of the year. Realize that despite the location between two major potato growing regions the soil here especially is NOT well suited for potato growing but they can certainly do okay.
Steve