Fight the power.It can be done with a bit of ingenuity, and gearing.
You might not get quite the torque as with an infernal combustion engine.
But tbh a lot of machinery..
Especially stuff like power harrows are over aggressive on the soil, and very bad for it.
So an overall reduction on power availability, would be no bad thing in many cases.
I use my tractor mounted rotovator. at something like one third of the recommended rpm, so as to avoid pulversing the soil so badly.
I get some looks* askance from the conventional lot, but it works for me.
* Teflon coated against charges of 'weirdness' at this stage in my game..