How much to grow

I found this in my garden journal and thought you might be interested.
This is how much you need to grow for a family of four. This is to keep in a root cellar.

Beets: 1-2 bushels
Carrots: 2-3 bushels
Cabbage: about 30 heads
Brussels sprouts: about 10-15 plants in garden
Chinese cabbage: 20-30 heads
Celery: 10-20 stalks
Turnips or rutabagas: about 1 bushel of each
Potatoes: 6-14 bushels
Sweet potatoes: 2 bushels
Endive: 10-20 plants for storage, more in the row for late fall
Squash and pumpkins: 30-40
Onions: 1-2 bushels
Parsnips: 1-2 bushels
Salsify: 1/2 - 1 bushel
Leeks: 15-40 plants
Celeriac: 1/2-1 bushel
Kale: 50-100 foot row
Winter radishes: 1/2-1 bushel
Kohlarabi: 1/2 - 1 bushel
Garlic 1/2 peck