1 acre.
A horse pasture should have enough space to graze as well as space to run. One horse is 1.5 AUs, so depending on your locality, pasture quality, time of year, etc., you could pasture one horse per 2 acres or more per month.
You will need more acres per horse in the southern part of Alberta than the north. Average is around 4 acres per horse, and up to 1.5 acre per horse in the northern parts. Though that's on excellent quality pasture: stocking rates may be a bit less on less-quality pasture. Not to mention that horses need room to run, unlike cattle, so you will need to add on a couple extra acres in addition to the amount that they will graze.
The amount of feed that should be given to a pastured horse will vary from horse to horse. Some horses may not require anything if the pasture quality is really good or if the horse is not in work or an easy keeper. However if the pasture is not of good quality then the horses may need at least supplemental hay and possibly a hard feed if the horse is a hard keeper or in moderate or higher work.
Yes, but the pasture in the winter may not be enough to sustain the horse so extra feed may be required.
In a stable in the countryside?
Ponies tend to gain weight quicker than horses. But, really, it depends on how much pasture they are on and the amount of grain you give them.
In North Carolina, the amount of land required to own a horse can vary depending on factors like the horse's size, exercise needs, and grazing opportunities. As a general guideline, it's recommended to have at least 1-2 acres of land per horse for grazing and exercise. Providing adequate shelter, fencing, and access to water is also important for horse ownership.
A horse in a good pasture will do.
This is the way horses are: your horse is the "new kid", the lowest in the pasture's pecking order. The gender make up of the pasture has an effect too, as does the gender of your horse; but they will all eventually work it out, it's a natural part of their world and they know how to handle it.
if you are the owner, then make the field more fertile if not, then choose a different center
You can place your horse in the pasture in order to give him forage. So long as he stays there long enough to give him the amount that he needs, you will not need to feed him forage from the feed box.
This can depend on the breed of horse and type of work the horse is being used for. Example, is the horse kept for training and competition or is the horse for hacking/riding for pleasure. Stable vs pasture can also depend on the time of year -winter vs summer and of course the quality of the pasture- is there shelter and food.