How Large Should That Farm/Crop Be?

[neelhtak_backwards]

To further answer my own question, some basic research so far:
According to Permies.com (forum) 0.5-0.6 square acres is enough to support an individual. This includes meat, as well as crops.
A user on the site backs these figures:

The 0.5 hectacre/person fits with my experience here in rocky, wintery, northern Vermont. I can provide all of our five person family's food and energy needs on four acres. Everything else is bonus.

I've shamelessly attached an image representing the amount of land required for crops vs. meat production (as found on the site).

Another user stated that

In our region we can graze ten pigs per acre.
That is about 1,600 lbs of meat a year after slaughter and cutting.
This is grazing without grain or commercial hog feed.
Likewise we can produce about 16 sheep or goats or about two cattle.
We're not on fantastic soils but rather high in the mountains on rocky land.
Perfect for pasture, not for cropping.
Down in the valley the land is far more productive.

Here is some more figures:
Wiki Answers states that

It depends greatly on location, type of wheat, and different farming practices.
In top wheat producing states Kansas, North Dakota, and Montana, non irrigated wheat yields are typically 30-50 bushels per acre with there being 60 lbs in a bushel. Irrigated yields in certain areas are over 100 bushels per acre.

The highest non irrigated or dry land wheat yields in the nation are in the palouse region of Eastern Washington and Northern Idaho. Winter wheat yields in Whitman county Washington averages 83 bushels an acre and Latah county Idaho averages 82 bushels an acre. Yields of up to 150 bushels an acre have occurred there.

For a medieval novel, or area (in which so many novels are often featured), it should be safe-ish to assume 45 bushels per acre is produced. This produces 2,700lbs of grain.
The Living Prepared blog states that:

A single loaf of bread uses 1 lb. of grain to make a single loaf

, and that in "disaster times" (could this be put towards individuals living in a rough-medieval society?)

On a per person basis... each person in your family or group will consume the equivalent of 3-4 loaves of bread items per week!

Thus, a single individual would consume 200lbs of bread-items per year.

Therefore, one acre of wheat crop will support twelve (12) to thirteen (13) people!