Ploughing/digging sowing etc depends on plot size. Allotment sized plots are easily dug by hand if ? you are able bodied. Any bigger than that (90'x30') and you would either want extra hands to help dig or you would want the use of a two wheeled tractor or rotavator, or if much bigger and access was good then a tractor with plough . Another way would be to get a couple of horses and plough with those. You could also get some pigs and let them do the work for you , but you still have to dig or rotavate afterwards. I suffer from a terrible affliction ... no money !!! . So I have to make do with hand digging which I get done over time . For my wheat though I will be using a horse plough pulled behind my 4x4 , many ways to skin a cat, as they say . As for sowing , you can buy walk behind seed sowers or you can just sow by hand . An acre doesn't take very long to do , but if you want a given amount per square yard or a given distance for weeding etc then a seed drill would be needed . As I say you can get walk behind ones but I have a set of plans to make a replica of Jethro Tull's seed drill . That I can use my pony or the 4x4 again or even use a 12v winch and cable to pull it across the field . The 12v winch also pulls the horse plough fine , if just a bit on the slow side. An old car starter motor fixed to a hand winch would work ok and be much cheaper than a bought good quality 12v winch.
cheers
Russ