This is a typical job where a tractor would certaily have made a mess of it. The soil was still fairly sticky, despite the mostly dry weather for the last three weeks, and the closer the horses came to the water source when passing back up to the beginning of the field after each turn, the harder the going was. Their hooves started going into the ground, which they didn't like but could manage ok, as they didn't have the pull of the plough. A tractor would surely have sunken right into the ground and turned it all up.
It is an interesting field alright, with very patchy soil - clay and gravel in places - but it gave us a good crop of potatoes last year, and we attempt to grow our sugar beet there this year. But first, we'll pass over it with the harrow a few times until the weather is warmer.