Yes we will add 'manure' but it is a commercial one, so not 100% manure, but sold as such. We've not added real manure for 6 years or so, because of the problem of mole crickets, which were attracted by the trailer loads of cow manure we had from the farm next door! They also like our kitchen compost matter. so anything that goes back onto the soil has to be gone through with a fine toothed comb!
Being self-sown lettuce/rocket/coriander, they actually all have tap roots as long as dandelion roots, so I guess I will have to lift them individually, as i doubt the roots will get chopped up sufficiently by the rotator.