This post caught my eye and is relevant all through the year – see April’s post on harvesting parsnips, planting potatoes on the same day, then compost/manure on top.
Recently I finished harvesting from a bed of overwintered leeks. I trod the clean, dry soil sown as it had loosened a bit when leeks were pulled out, exposing some lumps; then I watered it and spread an inch of mushroom compost, prior to planting summer beans in the middle or end of May. I water dry soil before spreading compost so that worms and other soil life can move freely underneath. Then if the weather stays dry there is a downward movement of soil organisms to moister zones which often happens in summer, although the organic matter on top does help to conserve moisture.