I have 2 small raised beds where I grow raspberries, strawberries and have also grown short beans, leeks and sprouting broccoli in the past. Problem is clay soil and this year it is even harder to dig. (I'm now 73 with a sore back!!!) Clumps are like stones. I have in the past put home made compost (which appears to have worked in the bush/flower bed) but not in veg bed. Bags and bags of farm manure as advised in local nursery. Has anyone tried covering the earth during the winter to stop the rain from washing everything away?