Heavy clay soil at my allotment

[Tartar Horde]

I have heavy clay on my property and IMO the best way to grow crops on this type of land is to use raised beds. Put as much compost etc as you can get onto the beds, continue adding compost at every opportunity and in a few years you will have great soil. Clay is actually one of the richest types of soil as it is full of minerals, but they are locked up, once you start to break clay down you can grow anything on it.