Too hard of soil can bruise a horses feet and legs, rocks can make a horse misstep, mud can be slippery. Too soft of dirt can cause a horse to work too hard or slip.
Depends on what you mean by permissible. Horseback riding can be theraputic, so it depends on how bad the back is.
mixed soil is bad ..... i don't know the rest It dependes on how you are using the soil If you are talking of riding on? Standing for long periods? If you are riding a jumping course on the soil? This info would be helpful to answering you question.
it has bad soil the climate it very cold and the bad soil makes it a bad place for growing crops
it makes it smell bad.
You probably have a bad bearing.
Human
I believe that the best horseback riding camps are those that are at stables that are in use all year round with horses that have had lessons on them and trainers and instructors that know the horse they are working with, stear clear of camps that lease their horses for the summer the horses come from barns that in my experience don't take very good care of the horses and many of the horses have bad habits. Look for camps that are primarily horseback riding. Circle square camp is a very good place look it up on the Internet!
bad
No it is not harmful because food is biodigratable and when it aborbs in to the soil in makes plants grow. It is good for our earth not bad for it.
Fish with high levels of mercury, like tuna and swordfish.
no
no