Anke, Im not planning to keep horses, too much care involved.
I guess the next question is timing, I need to flail now regardless, but then should I do the rest right away, Im guessing as a general rule the fruit trees need planting in winter, and Im contemplating the benefits of covering the field with plastic or some other material, as I believe this kills off weeds etc, alternatively I heard that crops like beans or peas have deep roots, which I could plant up, harvest then cut down leaving the roots to rot in situ, I guess the idea being that they help break up the clay for the fruit trees later...
Bloody hell this topic is bigger than I thought... I would go for some kind of training etc, but ive found in life that training is often better once you already have experience of the job in hand.....
I think the advice about horses was to HenLivingstone, I was going to say the exact same thing - worse thing to put on the land is horses, they'll poach it and won't eat everything. Try sheep! But have good fencing!
And liming might help in both cases!
Yes bare root trees (cheaper than pot grown) should be planted in their dormant season, which is good, gives you time to get ready and you'll be planting at a quiet time. Make sure you order in plenty of time.
Fruit trees, any newly planted trees in fact, will benefit greatly from having a metre of ground cover fabric or similar around them, they'll establish far better with no weed competition for a few years.
Be wary of digging a hole for planting and it just being a sump - the drainage channels will help and should be done in advance of planting to help the soil drain a little first, give the trees a chance!
Choose your rootstock carefully, go to a good nursery and let them advise you on local conditions, varieties that do well etc.
I would say get the surface of the field sorted asap too, deep ploughing should not be necessary. Top it by all means and leave the clippings to add to the fertility of the soil. I would also recommend pigs to do the hard work for you (biased!) no machinery or fossil fuels required, no chemicals either, they'll eat the roots of everything so weeds don't come back, manuring the whole field will be good prep for the trees and you'll have something nice to eat too.
Maybe then harrow after the pigs, reseed and roll the ground level.
Or you can use several plants to help improve the structure of the soil first in the newly pig ploughed field, eg. legumes fix nitrogen, so peas, beans, clover. Plants like comfrey bring minerals from deeper down with their big tap roots, then you harvest the leaves, several times per year if you like, and mulch with them, amongst other things. Other green manures would work, and could even be kept going under the orchard, it doesn't have to be just grass. In fact the more flowering plants the better for your bees! Although grazing animals would eat the flowers
Also sheep can damage trees, young ones would need to be well fenced individually, and I'd go for half/full standards, ie clear trunk to a certain height. My sheep strip bark off all the trees in our fields when they fancy it.
Geese make great lawnmowers under trees, although protect young trees and cut off low branches as they can also do damage.
Lots of ideas, no right or wrong way as such, HTH
Helen